I just can’t compute how this is possible. How can a telescope detect a gas, which isn’t even visible to the naked eye, on a planet that is an incomprehensible distance away.
[Source](https://www.bbc.co.uk/news/science-environment-66786611)
In: 143
The most simplistic way I can put it is light gets absorbed by particles as it passes through. Each element absorbs a different wavelength of light. All we have to do is look at the light coming off the planet and see which wavelengths are missing. This tells us the light passed through that gas, thus telling us what gases are on/around that planet.
Latest Answers