Today's Headlines - 09 August 2023
The legacy of the Voyager mission
GS Paper - 3 (Space Technology)
The National Aeronautics and Space Administration (NASA) lost communication with Earth’s longest-running space probe, Voyager 2, the space agency detected a “heartbeat” signal from the spacecraft. Although too faint for extraction of data, the detected signal confirms that Voyager 2, which is about 19.9 billion kilometres away from Earth, is still operating.
Why were the Voyager spacecraft sent into space?
In 1972, NASA cancelled its plans of exploring the five outer planets (Mars, Jupiter, Saturn, Uranus and Neptune) with four highly complex spacecraft — the proposal, estimated to cost $ 1 billion, was scrapped due to budgetary constraints.
Instead, it proposed to send the Voyager probes, initially slated to explore only Jupiter and Saturn. In 1974, however, it was decided that if one spacecraft completes the mission, the other one would be redirected towards Uranus and then Neptune.
Interestingly, the spacecraft were scheduled for a take-off towards the end of the 1970s for a reason.
NASA chose the particular launch window to take advantage of a rare alignment of Jupiter, Saturn, Uranus and Neptune that occurs once every 175 years.
The alignment allowed the spacecraft to harness the gravity of each planet and swing from one to the next using relatively minimal amounts of fuel. NASA first demonstrated the technique with its Mariner 10 mission to Venus and Mercury from 1973 to 1975.
Voyager 2 was launched on 20 August 1977, two weeks before the 5 September Voyager 1 takeoff.
This reversal of order took place as the two spacecraft were put on different trajectories — Voyager 1 was set on a path to reach Jupiter and Saturn, ahead of Voyager 2.
What are the most notable achievements of the Voyager spacecraft?
Fifteen months after its launch, Voyager 1 reached its first target planet, Jupiter, on 5 March 1979, and was soon followed by Voyager 2, which arrived there on 9 July.
The most interesting discoveries made by Voyager 1 included the finding that Io, one of Jupiter’s moons, was geologically active.
After the Saturn expedition, as Voyager 1 headed on a trajectory to escape the solar system, Voyager 2 was redirected towards Uranus — both probes had fulfilled their primary mission goals but scientists kept them operational for further exploration.
Voyager 2 arrived at Uranus in 1986, becoming the first human-made object to fly past the aquamarine planet.
The spacecraft took stunning photographs and confirmed that the main constituents of Uranus are hydrogen and helium.
Then, the probe went to Neptune. Becoming the first human-made object to fly by the planet in 1989, Voyager 2 made some more notable discoveries there.
Apart from finding new moons and rings, it discovered that Neptune is more active than previously thought — winds on the planet blow at the speed of 1,100 kph.
After the Neptune encounter, Voyager 2, like Voyager 1, was put on the path to head out of the solar system. While Voyager 1 officially entered interstellar space in August 2012, Voyager 2 made its entry in November 2018.
#upsc #news #headline #voyager #mission #legacy #space #technology #national #aeronautics #spacecraft #data #NASA #planets #jupiter #saturn #uranus #neptune #mars #mercury #solar #moons
The legacy of the Voyager mission
GS Paper - 3 (Space Technology)
The National Aeronautics and Space Administration (NASA) lost communication with Earth’s longest-running space probe, Voyager 2, the space agency detected a “heartbeat” signal from the spacecraft. Although too faint for extraction of data, the detected signal confirms that Voyager 2, which is about 19.9 billion kilometres away from Earth, is still operating.
Why were the Voyager spacecraft sent into space?
In 1972, NASA cancelled its plans of exploring the five outer planets (Mars, Jupiter, Saturn, Uranus and Neptune) with four highly complex spacecraft — the proposal, estimated to cost $ 1 billion, was scrapped due to budgetary constraints.
Instead, it proposed to send the Voyager probes, initially slated to explore only Jupiter and Saturn. In 1974, however, it was decided that if one spacecraft completes the mission, the other one would be redirected towards Uranus and then Neptune.
Interestingly, the spacecraft were scheduled for a take-off towards the end of the 1970s for a reason.
NASA chose the particular launch window to take advantage of a rare alignment of Jupiter, Saturn, Uranus and Neptune that occurs once every 175 years.
The alignment allowed the spacecraft to harness the gravity of each planet and swing from one to the next using relatively minimal amounts of fuel. NASA first demonstrated the technique with its Mariner 10 mission to Venus and Mercury from 1973 to 1975.
Voyager 2 was launched on 20 August 1977, two weeks before the 5 September Voyager 1 takeoff.
This reversal of order took place as the two spacecraft were put on different trajectories — Voyager 1 was set on a path to reach Jupiter and Saturn, ahead of Voyager 2.
What are the most notable achievements of the Voyager spacecraft?
Fifteen months after its launch, Voyager 1 reached its first target planet, Jupiter, on 5 March 1979, and was soon followed by Voyager 2, which arrived there on 9 July.
The most interesting discoveries made by Voyager 1 included the finding that Io, one of Jupiter’s moons, was geologically active.
After the Saturn expedition, as Voyager 1 headed on a trajectory to escape the solar system, Voyager 2 was redirected towards Uranus — both probes had fulfilled their primary mission goals but scientists kept them operational for further exploration.
Voyager 2 arrived at Uranus in 1986, becoming the first human-made object to fly past the aquamarine planet.
The spacecraft took stunning photographs and confirmed that the main constituents of Uranus are hydrogen and helium.
Then, the probe went to Neptune. Becoming the first human-made object to fly by the planet in 1989, Voyager 2 made some more notable discoveries there.
Apart from finding new moons and rings, it discovered that Neptune is more active than previously thought — winds on the planet blow at the speed of 1,100 kph.
After the Neptune encounter, Voyager 2, like Voyager 1, was put on the path to head out of the solar system. While Voyager 1 officially entered interstellar space in August 2012, Voyager 2 made its entry in November 2018.
#upsc #news #headline #voyager #mission #legacy #space #technology #national #aeronautics #spacecraft #data #NASA #planets #jupiter #saturn #uranus #neptune #mars #mercury #solar #moons