Catch up on stories from the past week (and beyond) at the Slashdot story archive

 



Forgot your password?
typodupeerror
Get HideMyAss! VPN, PC Mag's Top 10 VPNs of 2016 for 55% off for a Limited Time ×
Space Science

Thin Oxygen-CO2 Atmosphere Discovered On Rhea 37

Randyll writes "During its Saturn flyby in March, the Cassini space probe detected an oxygen-rich atmosphere on Rhea, Saturn's second-largest moon. While 100 times thinner than the atmospheres of Europa or Ganymede, Rhea's atmosphere contains a surprising amount of carbon dioxide. There is an explanation for the oxygen — the decomposition of surface ice — while the origin of the carbon dioxide is a mystery. A few of the possible explanations are that Rhea has carbon-rich organic molecules or that the gas is seeping from Rhea's interior. However, researchers have been unable to determine the exact source for the gas." While "richness" is relative — the study's abstract refers to Rhea's atmosphere as "tenuous," and oxygen concentrations are trillions of times lower there than they are on Earth — the finding still puts Rhea in rare company among the planets and moons of the solar system.
This discussion has been archived. No new comments can be posted.

Thin Oxygen-CO2 Atmosphere Discovered On Rhea

Comments Filter:

"What if" is a trademark of Hewlett Packard, so stop using it in your sentences without permission, or risk being sued.

Working...