My gf and I are just confused cos the best two telescopes out there are hubble and JWST, right? And they’re great at what they do respectively, but how the hell do we know that a planet millions of light years away has an atmosphere made up of x.
Was prompted because of an article which said “It may have detected a molecule called dimethyl sulphide (DMS). On Earth, at least, this is only produced by life. “ like how tf can we detect a MOLECULE that is so far away.
My guess is colours but no clue.
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When a planet passes between its sun and us, some of the light passes through the atmosphere on its way to us. By looking at how the light changed we can start to deduce the chemical composition of the atmosphere
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