Natural geological and geographical locations and features are not copyrighted. They are not inherently a creative work (though many religions would disagree), so no attribution or licensing is required.
However, if you were to recreate an alien planet from an existing work (which comes from someones creative imagination), then you’d have trouble, especially if its a blatant copy / reproduction. If it’s coincidental and you can prove it, you’d probably be okay in court.
Example: A replica of the death star from Star wars would probably get you sued. Creating an ice planet with hills of snow which coincidentally happen to resemble the topography of Hoth most likely won’t.