(zeeharyana.com) :- Chandrayaan-2 currently orbiting the Moon has detected Argon-40 in the lunar exosphere according to ISRO. It has been able to do that with the help of its Chandra’s Atmospheric Composition Explorer-2 (CHACE-2) payload. Chandrayaan-2 has detected Argon-40 from an altitude of about 100 km. Argon-40 also known as 40Ar is an isotope of the noble gas Argon. Argon is third most abundant gas in the Earth’s Atmosphere.