CHANDRAYAAN-2 FOUND ARGON GAS IN THE EXOSPHERE OF THE MOON, PROVIDING EXCITING INSIGHTS
Chandrayaan-2,
an Indian spacecraft, has made some discoveries concerning the Moon.
Chandrayaan-3 is scheduled to launch later this year, while its predecessor is
still collecting data on the Moon's surface.
According
to an ISRO release, the Chandra's Atmospheric Composition Explorer-2 (CHACE-2)
instrument onboard the Chandrayaan-2 discovered Argon-40 in the lunar exosphere
- the upper atmosphere of the Moon located beyond places where it was
previously known to exist.
What
exactly does this imply? This discovery could shed light on how lunar
exospheric organisms and processes manifest themselves on the Moon.
As
a result, scientists may be able to better comprehend the makeup of the lunar
surface. The CHACE-2 detected the existence of Argon in the Moon's equatorial
and mid-latitude regions.
Why is this
discovery significant?
It's
worth noting that this isn't the first time Argon-40 has been discovered on the
Moon. Previous observations, as observed by the Apollo-17 mission, were limited
to near-equatorial zones. "Argon-40 (Ar-40) is known to occur in the lunar
exosphere, but there is little information about its distribution at higher
latitudes. According to a report published in the scientific journal
Geophysical Research Letters, Chandra's Atmospheric Composition Explorer-2
experiment aboard Chandrayaan-2 satellite "has constantly recorded Ar-40
in the latitude range of -60 to +60 degrees for the first time."
Argon-40
is classified as a noble gas since it is inert, colourless, and odourless.
According to ISRO, the gas forms, diffuses with inter-granular space, and
finally rises to the lunar exosphere.
The
study found an increase in Argon-40 density around the dawn terminator, a
reduction along the dayside, a secondary peak near the sunset terminator, and a
night-side minimum, led by M.B. Dhanya of the Vikram Sarabhai Space Centre.
Even
with changes in temperature and topography, they discovered that the density of
Argon-40 along solar longitudes is similar to that of low latitude locations.
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