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ISRO: Chandrayaan-2 Orbiter Detects Argon-40 on Lunar Exosphere

Planetary scientists prefer to call the thin gaseous envelope around the Moon as the 'Lunar exosphere' since it is so tenuous

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ISRO, Chandrayaan 2, Argon 40
Argon-40 (40Ar), which is one of the isotopes of the noble gas Argon, is an important constituent of the lunar exosphere, ISRO said on Thursday. Pixabay

The Chandra’s Atmospheric Composition Explorer-2 (CHACE-2) payload aboard the Chandrayaan-2 Orbiter has detected Argon-40, said Indian Space Research Organisation (ISRO).

According to ISRO, the Orbiter that is orbiting the moon has detected Argon-40 from an altitude of about 100 km.

Argon-40 (40Ar), which is one of the isotopes of the noble gas Argon, is an important constituent of the lunar exosphere, ISRO said on Thursday.

Planetary scientists prefer to call the thin gaseous envelope around the Moon as the ‘Lunar exosphere’ since it is so tenuous that the gas atoms very rarely collide with each other, ISRO said.

ISRO, Chandrayaan 2, Argon 40
According to ISRO, the Orbiter that is orbiting the moon has detected Argon-40 from an altitude of about 100 km. Pixabay

According to ISRO, Argon-40 or 40Ar originates from the radioactive disintegration of Potassium-40 (40K).

The radioactive 40K nuclide, which is present deep below the lunar surface, disintegrates to 40Ar, which, in turn, diffuses through the intergranular space and makes way up to the lunar exosphere through seepages and faults.

The Indian space agency said CHACE-2 payload, is a neutral mass spectrometer-based payload which can detect constituents in the lunar neutral exosphere in the range of 1-300 amu (atomic mass unit).

As part of its early operation, it has detected 40Ar in the lunar exosphere from an altitude of about100 km, capturing the day-night variations of concentration.

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The 40Ar being a condensable gas at the temperatures and pressures that prevail on the lunar surface, condenses during lunar night. After lunar dawn, the 40Ar starts getting released to the lunar exosphere, ISRO said. (IANS)

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Twitter Trolls Chetan Bhagat for Being ISRO’s Chief Guest: Report

Earlier, Bhagat faced strong criticism from the audience when he was invited as a judge on a dance reality show

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Twitter, India, Smartphone
Twitter on a smartphone device. Pixabay

Netizens took no time to troll Indian author Chetan Bhagat for being honoured at Indian Space Research Organisation (ISRO) as the chief guest at an event and couldn’t believe that he had been chosen to address them.

“Really honoured to be the Chief Guest at ISRO for the recent celebrations of the World Space Week. I can’t believe one of India’s finest organisations chose me to address them. Truly a big moment of my life – my own moon landing! #isro #chetanbhagat #worldspaceweek,” Chetan Bhagat wrote in a post on Monday.

“With losing all communication with Chandrayan-2 Lander Vikram, looks like ISRO has also lost its sense inviting this joker as a Chief Guest. Even he can’t believe it,” wrote another user.

ISRO, Twitter
Netizens took no time to troll Indian author Chetan Bhagat for being honoured at Indian Space Research Organisation (ISRO).

Twitteratis wondered why he did not get such honour to be at the prestigious ISRO.

“Chandrayan failure was just a small setback for ISRO. But inviting you as cheif guest has me worried a lot more about the future direction of the organisation,” mentioned another.

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“Chetu Bhai, why don’t you go to Moon or Mars? ISRO should run a pilot program with you. There are lots of readers for your novels,” a user added.

Earlier, Bhagat faced strong criticism from the audience when he was invited as a judge on a dance reality show. (IANS)