Physics Stack Exchange is a question and answer site for active researchers, academics and students of physics. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

How is the atmosphere composition of astronomical objects, for example triton, the moon of neptune, determined?

share|cite|improve this question
This would have been just as good--or perhaps a bit better--on on Astronomy.SE (no pressure, I won't migrate it to a beta site without your say-so). I'll migrate if you want, or it can stay here (but please don't cross-post). – dmckee Oct 8 '11 at 1:27
up vote 3 down vote accepted

They check for absorption lines when conditions are appropriate. Have a look at this ozone layer in Venus' atmosphere detected by ESA.

share|cite|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.