Thank you for participating! I think we had a record this week, with 16 of 21 words identified by Steemizens (including "atmosphere" by @chriddi ;-)

it is also one of the few known temperate exoplanets that exhibits characteristics consistent with an ocean planet and is close enough to Earth for researchers to study its atmosphere

Here is the word list:

artistic astronomical atmosphere binary clues density
discovered global illustrations images liquid material
moons observation ocean planet radius researchers
stars surface water

And here is the solution: