KSG Podcast - Earth is getting a 'Black Box' | Short Crisp Concise and Exam Oriented #podcast
https://www.youtube.com/watch?v=sYkbQMkEjOo
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KSG Podcast - Earth has a second ‘Trojan’ asteroid | daily editorial analysis for upsc aspirants
https://www.youtube.com/watch?v=j4mXDvZOqbU
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KSG Podcast - Earth is getting a 'Black Box' | Short Crisp Concise and Exam Oriented #podcast
https://www.youtube.com/watch?v=sYkbQMkEjOo&list=PLCUwtp5IghZmJBi1h7xiAhsORKmmumVsR&index=59
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KSG Podcast - Earth has a second ‘Trojan’ asteroid | daily editorial analysis for upsc aspirants
https://www.youtube.com/watch?v=j4mXDvZOqbU&list=PLCUwtp5IghZmJBi1h7xiAhsORKmmumVsR&index=62
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Commercial mining of critical minerals approved
GS Paper - 2 (Polity)

The Union Cabinet approved amendments to the Mines and Minerals (Development and Regulation) Act, 1957, that will pave the way for commercial mining of six critical minerals — lithium, beryllium, niobium, tantalum, titanium and zirconium — and deep-seated minerals like gold, silver and copper.

More about the News

Currently, commercial mining of these critical minerals by private companies is prohibited. Only government agencies were allowed in exploration and mining operations.
These minerals are key components of all modern technologies and go into the making of mobile phones, electric vehicles, solar panels, semiconductors, and wind turbines, among others.
In February this year, the Geological Survey of India discovered a 5.9-million-tonne reserve of lithium in Jammu & Kashmir’s Reasi district.
The amendments, once cleared by Parliament, will also allow the government to grant a single exploration licence to companies through auction.
This is expected to be a big incentive for private companies, especially junior mining companies involved in exploration operations.
This will allow companies a seamless process — from conducting reconnaissance (exploration) and prospecting operations (undertaken for the purpose of exploring, locating or proving the presence of mineral deposit) to finally getting the rights to mine a mineral resource, once it is discovered and the mine is auctioned.
Currently, the MMDR Act grants private companies a mining lease and a composite licence through an auction for conducting exploration and mining.

Flashback

The government is currently giving composite licences in a smaller area (up to 25 square kilometres).
But in the amendments, the ministry has proposed giving an exploration licence for a larger area of up to 5,000 sq km of a single block. The total area with one entity will not exceed 10,000 sq km.
The MMDR Act regulates the mining sector in India and mandates the requirement for granting leases for mining operations. This is the fifth time that the MMDR Act, 1957, will be amended.
India is dependent on China and other countries to meet its requirement of critical minerals including Rare Earth Elements (REE), which are the building blocks of modern-day technologies.

#upsc #news #union #commercialmining #criticalminerals #technologies #mmdr #geologicalsurvey #exploration #earth #elements #india #dependent

Today's Headlines - 24 July 2023
India’s first ‘satellite network portal site’
GS Paper - 3 (Space Technology)

The Gujarat government through its Department of Science and Technology (DST) signed a memorandum of understanding with OneWeb India Communications Pvt Ltd for setting up a ‘satellite network portal site’ — a first for India — at Mehsana in Gujarat.

What is the Satellite network portal site?

Satellite broadband technology or satellite telephony is not a new concept and with satellite constellations in the low Earth orbit (LEO) gaining traction with StarLink, Kuiper and OneWeb among many others, the world is increasingly moving towards relying on LEO satellite communications.
LEO satellites operate at an altitude of 500 to 1,200 km, making it ripe for high-speed and low latency — a lower time lag between a user seeking data, and the server sending that data, compared to geostationary Earth orbit positioned satellites.
OneWeb has 648 satellites orbiting at 1,000-1,200 km making 13 orbits per day, covering the entire globe.
The satellite network portal (SNP) site will serve as a signal and data downlink and uplink terminal or base station on the ground, an intermediary for data transmission through satellite tracking antenna systems.
OneWeb India Communications plans to invest up to Rs 100 crore in this project, which would, according to the Gujarat government, create 500 direct and indirect jobs, including jobs requiring telecom, electronics and instrumentation engineers.
Apart from civil infrastructure, setting up an SNP like this will also require a slew of regulatory approvals from the Indian National Space Promotion and Authorisation Centre (IN-SPACe) and spectrum allocation from the Telecom Regulatory Authority of India (TRAI).
Earlier, HCIPL and OneWeb, in January 2022, announced a strategic six-year Distribution Partner agreement to provide low Earth orbit (LEO) connectivity services across India, to deliver services to enterprises and government with OneWeb capacity, especially in areas outside the reach of fibre connectivity.

#upsc #news #todayheadline #india #satellite #network #portalsite #spacetechnology #gujarat #government #science #DST #oneweb #communications #mehsana #telephony #constellation #LEO #earth #starlink #kuiper #geostationary #SNP #terminal #INSPACE #fibre #connectivity #strategic #telecomregulatory

Today's Headlines - 02 August 2023
Climate change is altering the colour of the oceans
GS Paper - 3 (Environment)

The colour of the Earth’s oceans has significantly altered over the past two decades, most likely due to human-induced climate change, according to a new study. Over 56 per cent of the oceans, more than the total land area on the planet, has experienced the shift in colour, it added. The study, ‘Global climate-change trends detected in indicators of ocean ecology’, was published in the journal Nature.

What makes the oceans colourful in the first place?

In most regions across the world, the oceans appear blue or navy blue for a reason. This happens due to “the absorption and scattering of light”.
When the sunlight falls on deep and clear water, colours with longer wavelengths, such as red, yellow and green, are absorbed by the water molecules but blue and violet, which have a much shorter wavelength, are reflected back.
When sunlight hits the ocean, some of the light is reflected back directly but most of it penetrates the ocean surface and interacts with the water molecules that it encounters.
The red, orange, yellow, and green wavelengths of light are absorbed so that the remaining light we see is composed of the shorter wavelength blues and violets.
But when the water isn’t deep or clean, an ocean can appear to be of a different colour.
For instance, along Argentina’s coastline, where major rivers merge into the Atlantic Ocean, the ocean exudes a brown tint because of dead leaves and sediments spewing from the rivers.
In other parts of the world, the oceans appear green, which happens due to the existence of phytoplankton on the upper surface of the water.
Phytoplanktons are microscopic marine algae that contain the green-coloured pigment chlorophyll.
The pigment helps them absorb sunlight, which they use to capture carbon dioxide from the atmosphere and convert it into sugars. Moreover, chlorophyll absorbs the red and blue portions of the light spectrum — or photosynthesis — and reflects green light.

What methods were used to carry out the study?

To conduct the study, Cael and his team first analysed data from Moderate Resolution Imaging Spectroradiometer (MODIS), aboard NASA’s Aqua satellite, which has been monitoring ocean colour since 2002 — the measurements are taken in terms of the amount of light coming off the surface of the oceans, at all seven of the different wavelengths of light, from violet to red.
The examination of 20 years worth of data indicated that in more than 50 per cent of the world’s oceans, the colour has changed.
Then, to check if the phenomenon has occurred due to climate change, researchers used a climate model – a computer representation of the Earth.
This model simulated the planet’s oceans under two scenarios: one with the addition of greenhouse gases, and the other without it.
The greenhouse-gas model predicted that a significant trend should show up within 20 years and that this trend should cause changes to ocean colour in about 50 percent of the world’s surface oceans — almost exactly what Cael found in his analysis of real-world satellite data.

#upsc #news #headline #climate #colour #oceans #pigment #phytoplankton #chlorophyll #sediments #spewing #rivers #spectrum #methods #MODIS #NASA #Aqua #satellite #world #earth #wavelength #gases #greenhouse #data #planet

Today's Headlines - 03 August 2023
ISRO rocket debris on Australian shore
GS Paper - 3 (Space Technology)

A large object found on the shores of western Australia a couple of weeks ago has been confirmed to be the debris of an Indian Space Research Organisation (ISRO) rocket, the Australian Space Agency said. ISRO has agreed with the assessment, saying the debris could be from one of its Polar Satellite Launch Vehicle (PSLV) rockets. The ISRO said the agency was still to decide on the future course of action.

Are such incidents normal?

Junk from space objects falling to the earth are not unheard of. Most such incidents involve relatively small fragments from rockets that survive the friction of the atmosphere.
These usually do not make big news, also most of the time the space junk falls into oceans thus posing little danger to human populations.
But there have been a few highly publicised falls as well. In recent times, a large chunk of a 25-tonne Chinese rocket fell into the Indian Ocean in May 2021.
The most famous such case remains that of the Skylab space station, a predecessor to the currently operational International Space Station, which disintegrated in 1979.
Large chunks from this disintegration fell into the Indian Ocean, some of them falling on land in Western Australia.

Isn’t it dangerous?

The threat to life and property from falling space junk is not negligible. Even when falling into the oceans, which is more likely since 70 per cent of the earth’s surface is ocean, large objects can be a threat to marine life, and a source of pollution.
However, there are no recorded incidents of these falling objects causing any appreciable damage anywhere on the earth. When they have dropped over land, so far, it has been over uninhabited areas.

What happens if these objects cause damage?

There are international regulations governing space debris, which include junk falling back on the earth.
Most space-faring countries are signatories to the Convention on International Liability for Damage Caused by Space Objects.
This convention is one of the several international agreements that complement the Outer Space Treaty, the overarching framework guiding the behaviour of countries in space.
The Liability Convention deals mainly with damage caused by space objects to other space assets, but it also applies to damage caused by falling objects on earth.
The Convention makes the launching country “absolutely liable” to pay compensation for any damage caused by its space object on the earth or to a flight in air. The country where the junk falls can stake a claim for compensation if it has been damaged by the falling object.
In the current case, if the PSLV junk had caused any damage in Australia, India could have been liable to pay compensation, even if the object fell into the ocean and was then swept to the shores.
The amount of compensation is to be decided “in accordance with international law and the principles of justice and equity”.
This provision of the Convention has resulted in compensation payment only once so far — when Canada sought damages from the then Soviet Union, for a satellite with radioactive substance that fell into an uninhabited region in its northern territory in 1978. The Soviet Union is reported to have paid 3 million Canadian dollars.

#upsc #news #headline #ISRO #rocket #australian #space #technology #PSLV #satelite #launch #Vehicle #atmosphere #Indian #ocean #western #marine #earth #damage #countries #liability #canada #soviet #canadian #dollars #territory #shores #satellite

Today's Headlines - 05 August 2023
Mineral iron is important in ocean ecosystems
GS Paper - 3 (Environment)

According to new research published in Nature, mineral forms of iron play an important role in regulating the cycling of this bio-essential nutrient in the ocean. The discoveries pave the way for future research into the relationship between the iron and carbon cycles, as well as how changing ocean oxygen levels may interact.

More about the research

The research, led by the University of Liverpool and involving collaborators from the United States, Australia, and France, aims to fill a knowledge gap in ocean science.
The early Earth's ocean was low in oxygen and high in iron, which served as a catalyst in many biological reactions. These include photosynthesis, which oxygenated the earth's system through its proliferation.
Because iron is less soluble in well-oxygenated seawater, precipitation and sinking of iron oxides resulted in a decrease in iron levels.
As a result, iron now plays a critical role in regulating ocean productivity and thus ecosystems throughout the modern ocean.
It is thought that organic molecules called ligands, which bind iron, regulate iron levels above their soluble thresholds.
This viewpoint has underpinned the representation of the marine iron cycle in global models used to investigate how future climate changes will affect levels of biological productivity.
However, oceanographers have been perplexed as to why there appeared to be a much larger loss of iron due to insolubility in the ocean than would be expected based on the measured high levels of ligands.
In general, ocean models built in accordance with the expected pattern have performed poorly in reproducing observations.

#upsc #news #headline #mineral #iron #ocean #ecosystem #enviroment #bioessential #nutrient #carboncycles #oxygenlevels #liverpool #US #Australia #france #photosynthesis #ligands #climatechanges #bindiron #regulateiron #seawater #earth

Today's Headlines - 07 August 2023
Satellite bus technology transfer to private firm
GS Paper- 3 (Space Technology)

ISRO said it has transferred the IMS-1 Satellite Bus Technology to Alpha Design Technologies Pvt. Ltd in a step towards enhancing private industry participation in the country's space sector. NewSpace India Limited (NSIL), the commercial arm of ISRO, facilitated the technology transfer through an agreement signed during an event held at the NSIL headquarters 2, the space agency said.

More about the News

The technology transfer documents were formally handed over by D Radhakrishnan, Chairman and Managing Director of NSIL to Col. H S Shankar (Retd.), Chairman and Managing Director of ADTL.
ADTL is one of the two private players identified to receive the transfer of this technology through Interest Exploratory Note (IEN) published by NSIL.
This transfer marks the beginning of satellite bus technologies developed by ISRO being transferred to private industries. Further, the PSLV is under productionisation by a consortium of industries.
ISRO has been enabling private players to develop space technologies by facilitating and extending the expertise thus ensuring both out-bound and in-bound approaches.
By transferring the IMS-1 technology to the private sector, ISRO/DoS (Department of Space) aims to bolster India's industrial growth in the space sector and foster technological self-reliance, it further said, adding the development opens up new avenues for private players to contribute to space research and exploration, in line with India's vision to expand its presence in the global space market.

About Satellite bus

The satellite bus, developed by ISRO's U R Rao Satellite Centre (URSC), is a versatile and efficient small satellite platform designed to facilitate low-cost access to space.
The bus serves as a dedicated vehicle for various payloads, enabling earth imaging, ocean and atmospheric studies, microwave remote sensing, and space science missions while ensuring a quick turnaround time for satellite launches.
The IMS-1 bus, weighing about 100 kg, accommodates a 30kg payload. Solar arrays generate 330W power with a raw bus voltage of 30-42 V, ISRO said, adding it offers a 3-axis stabilised with four reaction wheels with a 1 Newton thruster that provides +/- 0.1 degree pointing accuracy.
It is a forerunner for IMS-2 bus technology, capable of improved features, and IMS-1 bus is utilised in previous ISRO missions like IMS-1, Youthsat and Microsat-2D.

About ADTL

Alpha Design Technologies Pvt. Ltd (ADTL) is an aerospace and defence company, with expertise in engineering, manufacturing, and system integration.
It has been a key player in various projects related to defence, space and homeland security, contributing significantly to India's technological progress in these domains.

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Today's Headlines - 09 August 2023
Nuclear-powered rocket cut travel time to Mars
GS Paper - 3 (Energy)

In less than three years, NASA could be testing a nuclear rocket in space. The space agency and the Defense Advanced Research Projects Agency, or DARPA, announced that Lockheed Martin had been selected to design, build and test a propulsion system that could one day speed astronauts on a trip to Mars. The program is named DRACO, short for the Demonstration Rocket for Agile Cislunar Operations.

What if a spacecraft could get to Mars in half the time it currently takes?

Every 26 months or so, Mars and Earth are close enough for a shorter journey between the worlds. But even then it is a pretty long trip, lasting seven to nine months. For most of the time, the spacecraft is just coasting through space.
But if the spacecraft could continue accelerating through the first half of the journey and then start slowing down again, the travel time could be slashed.
Current rocket engines, which typically rely on the combustion of a fuel like hydrogen or methane with oxygen, are not efficient enough to accomplish that; there is not enough room in the spacecraft to carry that much propellant.
But nuclear reactions, generating energy from the splitting of uranium atoms, are much more efficient.
The DRACO engine would consist of a nuclear reactor that would heat hydrogen from a chilly minus 420 degrees Fahrenheit to a toasty 4,400 degrees, with the hot gas shooting from a nozzle to generate thrust. Greater fuel efficiency could speed up journeys to Mars, reducing the amount of time astronauts spend exposed to the treacherous environment of deep space.
Nuclear propulsion could also have uses closer to home, which is why DARPA is investing in the project. The technology may allow rapid maneuvers of military satellites in orbit around Earth.

Flashback

Nuclear propulsion for space is not a new idea. In the 1950s and 1960s, Project Orion — financed by NASA, the Air Force and the Advanced Research Projects Agency — contemplated using the explosions of atomic bombs to accelerate spacecraft.
At the same time, NASA and other agencies also undertook Project Rover and Project NERVA, efforts that aimed to develop nuclear-thermal engines similar in concept to those now being pursued by the DRACO program.
A series of 23 reactors were built and tested, but none were ever launched to space. Until the end of this program in 1973, NASA had contemplated using nuclear reactors to propel space probes to Jupiter, Saturn and beyond, as well as to provide power at a lunar base.
The technical capabilities, including early safety protocols, remain viable today, Tabitha Dodson, the DRACO project manager, said in a news briefing on 2 August 2023.
A key difference between NERVA and DRACO is that NERVA used weapons-grade uranium for its reactors, while DRACO will use a less-enriched form of uranium. The reactor would not be turned on until it reached space, part of the precautions to minimize the possibility of a radioactive accident on Earth.

#upsc #news #headline #nuclear #rocket #travel #mars #energy #space #propulsion #system #trip #darpa #astronauts #DRACO #demonstration #agile #cislunar #spacecraft #earth #journey #engines #hydrogen #methane #fuel #oxygen #uranium #DARPA #technology #NERVA

Today's Headlines - 12 August 2023
Russia’s Luna-25 mission
GS Paper - 3 (Space Technology)

As the Chandrayaan-3 mission tightens its orbit around the Moon, Russia was launched its first moon-landing spacecraft in 47 years on 11 August 2023. The Luna-25 mission is scheduled to land on the Moon on 23 August 2023, the same day as Chandrayaan-3’s planned landing.

More about Luna-25

Luna-25 was launched from the Vosthochny cosmodrome in the Russian Far East less than a month after Chandrayaan-3 launched from the Satish Dhawan Space Center in Sriharikota.
The Russian mission will try to land on the lunar South Pole just like the Indian mission, aiming for a prized destination that may hold significant quantities of ice that could be used to extract oxygen and fuel in the future.
If either of the missions succeeds before the other, it will be the first one to land on the lunar South Pole in human history.
Roscosmos, Russia’s ISRO counterparts said that Luna-25 will practice soft-landing, analyse soil samples and conduct long-term scientific research on the Moon’s surface.
The Chandrayaan-3 mission is carrying an orbiter, a lander and a rover. The lander and rover are carrying many scientific payloads.
This is Russia’s first lunar mission since 1976 when the country was part of the Soviet Union and it will be completed without equipment from the European Space Agency (ESA). ESA ended its cooperation with Roscosmos after Russia invaded Ukraine.
Luna-25 has a mass of 1.8 tons and carries 31 kilograms of scientific equipment, including some that it will use to take rock samples from up to a depth of 15 centimetres to test for the presence of water that could be used to support future crewed missions to the Moon.
The mission was originally scheduled to launch in October 2021 but was marred by many delays.
The Russian mission will take a lot less time to reach the Moon than Chandrayaan-3 because the latter is taking a longer route that takes advantage of the gravities of the Earth and the Moon to use a lot less fuel.
Russia willevacuate villagers from a village near the launch site due to a “one in a million chance” that one of the rocket stages that launches could fall to the Earth there.

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Today's Headlines - 16 August 2023
Isro’s space probe to study the Sun
GS Paper - 3 (Space Technology)

The Indian Space Research Organisation (Isro) released images of the Aditya-L1 mission — the space agency’s first attempt to study the Sun. The satellite has reached the Satish Dhawan Space Center (SDSC) in Sriharikota, Andhra Pradesh, for its integration with the launch vehicle, PSLV.

What is the Aditya-L1 mission?

The Aditya-L1 will observe the Sun from a close distance, and try to obtain information about its atmosphere and magnetic field.
It’s equipped with seven payloads (instruments) on board to study the Sun’s corona, solar emissions, solar winds and flares, and Coronal Mass Ejections (CMEs), and will carry out round-the-clock imaging of the Sun.

Why is studying the Sun important?

Every planet, including Earth and the exoplanets beyond the Solar System, evolves — and this evolution is governed by its parent star.
The solar weather and environment affect the weather of the entire system. Variations in this weather can change the orbits of satellites or shorten their lives, interfere with or damage onboard electronics, and cause power blackouts and other disturbances on Earth. Knowledge of solar events is key to understanding space weather.
To learn about and track Earth-directed storms, and to predict their impact, continuous solar observations are needed.
Every storm that emerges from the Sun and heads towards Earth passes through L1, and a satellite placed in the halo orbit around L1 of the Sun-Earth system has the major advantage of continuously viewing the Sun without any occultation/eclipses.
L1 refers to Lagrangian/Lagrange Point 1, one of five points in the orbital plane of the Earth-Sun system. Lagrange Points, named after Italian-French mathematician Josephy-Louis Lagrange, are positions in space where the gravitational forces of a two-body system (like the Sun and the Earth) produce enhanced regions of attraction and repulsion.
These can be used by spacecraft to reduce fuel consumption needed to remain in position. The L1 point is home to the Solar and Heliospheric Observatory Satellite (SOHO), an international collaboration project of NASA and the European Space Agency (ESA).
The L1 point is about 1.5 million km from Earth, or about one-hundredth of the way to the Sun. Aditya L1 will perform continuous observations looking directly at the Sun.
NASA’s Parker Solar Probe, launched in 2018, has already gone far closer — but it will be looking away from the Sun.
The earlier Helios 2 solar probe, a joint venture between NASA and the space agency of erstwhile West Germany, went within 43 million km of the Sun’s surface in 1976.

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Today's Headlines - 18 August 2023
Chandrayaan-3 lander separates from propulsion module
GS Paper - 3 (Space Technology)

The Chandrayaan-3 lander, which carries within it the 26kh rover, separated from the propulsion module on 17 August 2023 for its onward journey to the surface of the moon on 23 August 2023. The lander module will descend further down from the current near-circular orbit of 153 x 163 km after a de-boosting manoeuvre.

What is Propulsion module

The propulsion module, meanwhile, will continue orbiting the moon and studying the spectral signatures of Earth using a payload that was tacked on to the mission in addition to the science experiments carried on board its predecessor.
By studying Earth from the moon, the Spectro-polarimetry of Habitable Planet Earth (SHAPE) will help scientists understand the markers of life on exoplanets.
Although the planned mission life for the propulsion module – which was added to the mission in place of the orbiter to help carry the lander rover to the moon – was three to six months, it is likely to keep functioning beyond that. Meanwhile, the Propulsion Module continues its journey in the current orbit for months/years.
Since the orbiter of Chandrayaan-2 had functioned normally and the instruments on board carried out all the observations and experiments as intended, there was no need to include an orbiter component to Chandrayaan-3.
More about lander module

However, the lander module still needed to be transported to lunar orbit, and the propulsion module had this limited task to perform.
The Chandrayaan-3 mission has been designed to achieve what Chandrayaan-2 could not – soft landing and roving on the surface of the moon.
After the separation, the instruments on board the lander, including the three scientific payloads, will be activated and tested to check whether everything is functioning normally.
The lander will carry out two orbit-reduction manoeuvres on its own, first getting into the circular 100 x 100 km orbit, and then further closer to the moon in the 100 x 30 km orbit.
This powered descent was described as “fifteen minutes of terror” by the previous Isro chief K Sivan.
Flashback

Chandrayaan-2 had crash-landed just kilometres from its intended landing spot due to flaws in the algorithm of the onboard navigation software.
The software did not provide for an immediate error-correction step when the engines produced a higher-than-intended thrust.
The algorithm was designed to make the corrections after performing a few other urgent tasks. But this allowed the errors to accumulate and become unmanageable.

#upsc #news #headline #chandrayaan #lander #propulsion #module #spacetechnology #moon #journey #signatures #earth #orbit #mission #softlanding #playloads #manoeuvres #terror #crashlanded #kilometres #error #correction #unmanagable

Today's Headlines - 19 August 2023
WHO holds first traditional medicine summit
GS Paper - 3 (Health and Diseases)

The World Health Organization opened its first summit on traditional medicine with the group saying it was seeking to collect evidence and data to allow for the safe use of such treatments. Traditional medicines are a "first port of call for millions of people worldwide", the UN health agency said.

More about the summit

The two-day WHO Traditional Medicine Global Summit takes place alongside a meeting of G20 health ministers in the Indian city of Gandhinagar.
The first global traditional summit, co-hosted by the World Health Organization (WHO) and the Ministry of Ayush.
This summit is designed to foster political commitment and evidence-based action in the field of traditional medicine.
As a vital healthcare source for millions worldwide, traditional medicine will be closely examined and evaluated as a formidable force in addressing health and well-being needs.
With a wide array of engagement groups, working groups, and meetings, this event aims to represent the interests of the Global South countries within the G20 framework.
The theme of "One Earth, One Family, One Future" embodies India's philosophy of Vasudhaiva Kutumbakam.
More about traditional medicine

The UN health agency defines traditional medicine as the knowledge, skills and practices used over time to maintain health and prevent, diagnose and treat physical and mental illness.
But many traditional treatments have no proven scientific value and conservationists say the industry drives a rampant trade in endangered animals -- including tigers, rhinos and pangolins -- threatening the existence of entire species.
Use of homemade remedies soared during the Covid-19 pandemic, including a green herbal drink based on Artemisia that was promoted by Madagascar's president as a cure.
The plant has a proven efficacy in malaria treatment, but its use to combat Covid was widely scorned by many doctors.
In China, traditional medicine has a distinguished history, but top European medical bodies have previously demanded it be subject to the same regulatory oversight as conventional medical methods.
Flashback

Of the WHO's 194 member states, 170 acknowledged their use of traditional and complementary medicine since 2018, but only 124 reported having laws or regulations for the use of herbal medicines -- while only half had a national policy on such methods and medicines.
About 40 percent of approved pharmaceutical products currently in use derive from a "natural product basis", according to the WHO, which cited "landmark drugs" that derive from traditional medicine, including aspirin, drawing on formulations using willow tree bark.

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Today's Headlines - 19 August 2023
JWST discovered Earendel
GS Paper - 3 (Space Technology)

Astronomers have embarked on an extraordinary journey, utilizing the powerful gaze of the James Webb Space Telescope (JWST), to measure the most distant star ever observed - Earendel. This celestial entity came into the scientific spotlight after its discovery by the Hubble Space Telescope in the previous year.

Earendel and history of the universe

The awe-inspiring expansion of the universe since the Big Bang has propelled Earendel's residence to a colossal 28 billion light-years from Earth.
This revelation underscores the dynamic and evolving nature of the cosmos, where space itself unfurls over immense timescales.
Earendel's presence in the distant reaches of the universe was initially pinpointed through the phenomenon of gravitational lensing, a phenomenon where the gravitational pull of a massive foreground object acts like a lens, bending and amplifying the light of a more distant celestial body. This allowed Hubble to identify Earendel's distant glow.
What is Earendel?

Earendel is a distant star that holds the distinction of being the most distant star ever detected.
It was first discovered by the Hubble Space Telescope and has recently been studied further using the James Webb Space Telescope.
Earendel's light has taken approximately 12.9 billion years to reach Earth, meaning that it was shining not long after the universe's creation following the Big Bang.
This star is of significant interest due to its extreme distance and the insights it can provide about the early universe.
JWST's exploration of Earendel

The James Webb Space Telescope, with its unique vantage point and ability to observe in infrared light, built on Hubble's observations.
Employing a similar strategy of gravitational lensing, JWST used the gravitational influence of a cluster named WHL0137-08 to further explore Earendel's mysteries.
The telescope's Near-Infrared Camera (NIRCam) provided captivating insights, revealing Earendel to be a massive B-type star, boasting a temperature more than twice that of our sun and shining with a luminosity a million times greater.
What is JWST?

The James Webb Space Telescope (JWST) is a powerful astronomical observatory developed by NASA in collaboration with the European Space Agency (ESA) and the Canadian Space Agency (CSA).
It is designed to be the successor to the Hubble Space Telescope and is set to provide unprecedented views of the universe in infrared light.

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Today's Headlines - 24 August 2023
Vikram lander creates history
GS Paper - 3 (Space Technology)

India became the first country to touch down on the lunar South Pole on 23 August 2023 as billions watched from around the globe. The Chandrayaan-3 lander - designed to deploy a smaller, 26-kg lunar rover - landed on the surface of the moon, marking a giant leap in India’s spacefaring journey.The Moon has captivated human curiosity for centuries, and with each new mission.

What is the Moon's geological history and evolution?

The Moon is estimated to be about 4.5 billion years old, roughly the same age as the Earth.
The leading theory about the Moon's formation suggests that a Mars-sized celestial body collided with the young Earth, and the debris from this collision eventually coalesced to form the lunar body.
However, current geological evidence from the Moon suggests that it may be younger by just 60 million years compared to Earth.
How much do things weigh on the Moon?

The Moon's gravitational pull is much weaker than Earth's, approximately one-sixth of Earth's gravity.
As a result, objects on the Moon weigh significantly less than they do on Earth. This is due to the Moon's smaller size and mass.
For example, a person weighing 68 kilograms on the Earth would weigh only over 11 kg on the Moon.
Why do Indian scientists want to land on the Moon's South Pole?

The lunar South Pole has become a focal point for exploration due to its unique features and potential scientific value.
It is believed to host a vast reservoir of water ice in permanently shadowed regions. The presence of water is of immense significance for future space exploration, as it can be converted into resources such as drinking water, oxygen and hydrogen for rocket fuel.
Also, the permanently sunlit area in the region has a temperature of around minus 50 to 10 degrees Celsius, which provides better chemical conditions for the electronics onboard the rover and lander to work properly.
What is in the lunar South Pole?

The terrain and geology at the Moon's South Pole are distinct from other regions. Permanently shadowed craters provide extremely cold conditions that allow water ice to accumulate and persist.
The unique geography of the South Pole also creates regions of perpetual sunlight, which can be harnessed for solar power.
The terrain varies from rugged landscapes to relatively flat plains, offering a diverse range of scientific opportunities.
Why is a region of the lunar South Pole permanently shadowed?

This depends on the Moon's geology. The Moon's axis is only slightly tilted relative to its orbit around the Earth.
This results in certain areas near the poles being in permanent shadow. These shadows create extremely cold environments where temperatures can plummet to very low levels.
These frigid conditions are conducive to preserving water ice for billions of years.

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Today's Headlines - 29 August 2023
Crew-7 mission to space station
GS Paper - 3 (Space Technology)

Four astronauts from four countries, including the US, Denmark, Japan, and Russia, launched aboard a SpaceX rocket towards the International Space Station (ISS) from NASA’s Kennedy Space Center in Florida. This was the first US take-off in which all the astronauts atop the spacecraft belonged to a different country — until now, NASA had always included two or three of its own on its SpaceX flights. The mission has been known as Crew-7.

Why has such a diverse group of astronauts gone to the ISS?

The Crew-7 mission is a result of the ongoing cooperation among different countries in space, especially since the launch of the space station in 1998.
The International Space Station Program involves the US, Russia, Canada, Japan, and the participating countries of the European Space Agency, and is one of the most ambitious international collaborations ever attempted.
The program “brings together international flight crews, multiple launch vehicles, globally distributed launch, operations, training, engineering, and development facilities; communications networks, and the international scientific research community”.
What is the mission?

The Crew-7 is the eighth flight operated by NASA and Elon Musk-owned SpaceX as part of the agency’s commercial crew program, which has been taking astronauts to the ISS since SpaceX’s first crewed mission in 2020.
During their stay at the space station, the Crew-7 astronauts will conduct more than 200 science experiments and technology demonstrations to prepare for missions to the Moon, Mars, and beyond.
The research will include a collection of microbial samples from the exterior of the space station.
The team will also analyse how sleeping in the microgravity environment differs from Earth by examining astronauts’ brain waves while they sleep.
Yet another experiment will look at the formation of biofilms in wastewater on the space station, which could be key to finding better ways to recycle water for drinking and hygiene while in space (Yes, astronauts have long used recycled sweat and urine to drink and shower on the station).

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Today's Headlines - 01 September 2023
Super Blue Moon of Raksha Bandhan
GS Paper - 3 (Science and Technology)

The Raksha Bandhan full moon on 30-31 August was unusual: it was both a “blue moon” and a “super moon” and therefore, a “Super Blue Moon”, a rare trifecta of astronomical events.

What is a supermoon?

The orbit of the moon around the earth is not circular; it is elliptical, that is, an elongated or stretched-out circle. It takes the moon 27.3 days to orbit the earth.
It is 29.5 days from new moon to new moon, though. This is because while the moon is orbiting the earth, both the earth and the moon are also moving around the sun — and it takes additional time for the sun to light up the moon in the same way as it does at the beginning of every revolution around the earth.
The new moon is the opposite of the full moon — it is the darkest part of the moon’s invisible phase, when its illuminated side is facing away from the earth.
The point closest to earth in the moon’s elliptical orbit is called perigee, and the point that is farthest is called apogee.
A super moon happens when the moon is passing through or is close to its perigee, and is also a full moon. (This happens with a new moon as well, just that it is not visible.
A full moon occurs when the moon is directly opposite the sun (as seen from earth), and therefore, has its entire day side lit up. The full moon appears as a brilliant circle in the sky that rises around sunset and sets around sunrise. The moon appears ‘full’ not just on Purnima, but also on the night before and after the full moon night.
What is a blue moon?

Though the expression “once in a blue moon” implies a rare or unusual occurrence, a blue moon is not that rare an astronomical phenomenon.
There are a couple of definitions of a blue moon, but the one that is most commonly understood — and is endorsed by NASA — describes the situation when a full moon is seen twice in a single month.
Because the new moon to new moon cycle lasts 29.5 days, a time comes when the full moon occurs at the beginning of a month, and there are days left still for another full cycle to be completed.
Such a month, in which the full moon is seen on the 1st or 2nd, will have a second full moon on the 30th or 31st. According to NASA, this happens every two or three years.
The first full moon of August 2023 occurred on 1 August. That was also a super moon, but the super moon of 30-31 August will be bigger because the moon is now closer to the perigee.
Will the moon actually appear blue?

No. Sometimes, smoke or dust in the air can scatter red wavelengths of light, as a result of which the moon may, in certain places, appear more blue than usual. But this has nothing to do with the name “blue” moon.
Speaking of colours, you may have noticed that the moon appears more yellow/ orange when it is lower in the sky (closer to the horizon).
This is because moonlight travels for longer through the atmosphere at this stage, and along the way, more of the shorter, bluer wavelengths of light are scattered, leaving more of the longer, redder wavelengths.
NASA points out that dust or pollution can end up deepening the reddish colour of the moon.

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