Watch: KSG DYK - UPSC CSE Prelims Previous years' question | Polar Satellite Launch Vehicle #SHORTS
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KSG DYK - Polar Satellite Launch Vehicle (PSLV), the Workhorse of ISRO, comprises how many stages?
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Polar Satellite Launch Vehicle (PSLV), the Workhorse of ISRO, comprises how many stages?
a) Two
b)…
#polar #satellitelaunchvehicle #PSLV #ISRO #satellites #GSLV #upscmcq #shorts
Polar Satellite Launch Vehicle (PSLV), the Workhorse of ISRO, comprises how many stages?
a) Two
b)…
Today's Headlines - 21 August 2023
Russia’s Luna-25 crashes
GS Paper - 3 (Space Technology)
Russia’s Moon mission ended in failure after its spacecraft Luna-25 spun out of control and crashed into the moon, Russian space agency Roscosmos said on 20 August 2023.
What happened to Luna-25?
Luna-25 was supposed to land on the Moon on 21 August 2023, days ahead of India’s Chandrayaan-3. Its intended landing site was close to Chandrayaan-3’s, near the lunar south pole.
The crash was confirmed a day after Roscosmos reported an “abnormal situation” which its specialists were analysing.
The space agency had said on 19 August 2023 that it had lost contact with the aircraft as it was shunted into pre-landing orbit.
On 19 August 2023, in accordance with the flight program of the Luna-25 spacecraft, an impulse was provided for the formation of its pre-landing elliptical orbit.
Communication with the Luna-25 spacecraft was interrupted. The measures taken on 19 and 20 August 2023 to search for the device and get into contact with it did not produce any results. According to the results of the preliminary analysis, due to the deviation of the actual parameters of the impulse from the calculated ones, the device switched to an off-design orbit and ceased to exist as a result of a collision with the lunar surface, Roscosmos said.
The space agency also said, A specially formed interdepartmental commission will deal with the issues of clarifying the reasons for the loss of the Moon [mission].
What was the Luna-25 mission?
Although launched on 10 August 2023, almost a month after Chandrayaan-3’s launch on 14 July, Luna-25 rode on a powerful rocket to reach the lunar orbit in just six days.
It was supposed to land on the lunar South Pole before Chandrayaan-3, and its success would have made Russia the first country to do so. Luna-25’s mission life was for one year, and its lift-off mass was 1,750 kg.
It did not carry a rover, but had eight payloads mainly to study the soil composition, dust particles in the polar exosphere, and most importantly detect surface water on the moon.
Significance
The failure of Luna-25 underlines how tricky soft-landings on the Moon are, and echoes India’s heartbreak of 2019.
Since 1976, there has been just one country, China, which has been successful in getting its spacecraft to soft land on the moon.
It has done that twice, with Chang’e 3 and Chang’e 4. All other attempts in the last ten years, by India, Israel, Japan and now Russia, have remained unsuccessful.
If Chandrayaan-3 is able to land successfully, India would become just the fourth country in the world, after the United States, the erstwhile Soviet Union and China, to have landed a spacecraft on moon, and the first-ever to land close to the lunar south pole.
#upsc #news #headline #Russia #luna #crashes #space #technology #moonmission #failure #spacecraft #india #chandrayaan #aircraft #southpole #flight #situation #interdepartmental #comission #reasons #orbit #firstcountry #soilcomposition #particles #polar #exosphere #israel #japan #softland #world #india #states #soviet #china #southpole #rocket #collision #agency
Russia’s Luna-25 crashes
GS Paper - 3 (Space Technology)
Russia’s Moon mission ended in failure after its spacecraft Luna-25 spun out of control and crashed into the moon, Russian space agency Roscosmos said on 20 August 2023.
What happened to Luna-25?
Luna-25 was supposed to land on the Moon on 21 August 2023, days ahead of India’s Chandrayaan-3. Its intended landing site was close to Chandrayaan-3’s, near the lunar south pole.
The crash was confirmed a day after Roscosmos reported an “abnormal situation” which its specialists were analysing.
The space agency had said on 19 August 2023 that it had lost contact with the aircraft as it was shunted into pre-landing orbit.
On 19 August 2023, in accordance with the flight program of the Luna-25 spacecraft, an impulse was provided for the formation of its pre-landing elliptical orbit.
Communication with the Luna-25 spacecraft was interrupted. The measures taken on 19 and 20 August 2023 to search for the device and get into contact with it did not produce any results. According to the results of the preliminary analysis, due to the deviation of the actual parameters of the impulse from the calculated ones, the device switched to an off-design orbit and ceased to exist as a result of a collision with the lunar surface, Roscosmos said.
The space agency also said, A specially formed interdepartmental commission will deal with the issues of clarifying the reasons for the loss of the Moon [mission].
What was the Luna-25 mission?
Although launched on 10 August 2023, almost a month after Chandrayaan-3’s launch on 14 July, Luna-25 rode on a powerful rocket to reach the lunar orbit in just six days.
It was supposed to land on the lunar South Pole before Chandrayaan-3, and its success would have made Russia the first country to do so. Luna-25’s mission life was for one year, and its lift-off mass was 1,750 kg.
It did not carry a rover, but had eight payloads mainly to study the soil composition, dust particles in the polar exosphere, and most importantly detect surface water on the moon.
Significance
The failure of Luna-25 underlines how tricky soft-landings on the Moon are, and echoes India’s heartbreak of 2019.
Since 1976, there has been just one country, China, which has been successful in getting its spacecraft to soft land on the moon.
It has done that twice, with Chang’e 3 and Chang’e 4. All other attempts in the last ten years, by India, Israel, Japan and now Russia, have remained unsuccessful.
If Chandrayaan-3 is able to land successfully, India would become just the fourth country in the world, after the United States, the erstwhile Soviet Union and China, to have landed a spacecraft on moon, and the first-ever to land close to the lunar south pole.
#upsc #news #headline #Russia #luna #crashes #space #technology #moonmission #failure #spacecraft #india #chandrayaan #aircraft #southpole #flight #situation #interdepartmental #comission #reasons #orbit #firstcountry #soilcomposition #particles #polar #exosphere #israel #japan #softland #world #india #states #soviet #china #southpole #rocket #collision #agency
The points can be used as ‘parking spots’ for spacecraft in space to remain in a fixed position with minimal fuel consumption.
They have been named after Italian-French mathematician Joseph-Louis Lagrange (1736-1813), who was the first one to find the positions. So, between the Earth and the Sun, a satellite can occupy any of five Lagrangian points. “Of the five Lagrange points, three are unstable and two are stable. The unstable Lagrange points – labelled L1, L2, and L3 – lie along the line connecting the two large masses. The stable Lagrange points – labelled L4 and L5 – form the apex of two equilateral triangles. The L4 and L5 are also called Trojan points and celestial bodies like asteroids are found here.
#upsc #news #headline #india #first #sun #observatory #launched #space #technology #ISRO #AdityaL1 #firstspace #mission #SatishDhawan #spacecentre #Sriharikota #softland #spacecraft #nearmoon #southpole #polar #satellite #launch #PSLV #workhouse #rocket #chandrayaan #Mangalyaan #boosters #synchronous #orbit #lowerearth #haloorbit #chromosphere #corona #plasma #spectrometer #trojan #point #asteroids
They have been named after Italian-French mathematician Joseph-Louis Lagrange (1736-1813), who was the first one to find the positions. So, between the Earth and the Sun, a satellite can occupy any of five Lagrangian points. “Of the five Lagrange points, three are unstable and two are stable. The unstable Lagrange points – labelled L1, L2, and L3 – lie along the line connecting the two large masses. The stable Lagrange points – labelled L4 and L5 – form the apex of two equilateral triangles. The L4 and L5 are also called Trojan points and celestial bodies like asteroids are found here.
#upsc #news #headline #india #first #sun #observatory #launched #space #technology #ISRO #AdityaL1 #firstspace #mission #SatishDhawan #spacecentre #Sriharikota #softland #spacecraft #nearmoon #southpole #polar #satellite #launch #PSLV #workhouse #rocket #chandrayaan #Mangalyaan #boosters #synchronous #orbit #lowerearth #haloorbit #chromosphere #corona #plasma #spectrometer #trojan #point #asteroids