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A comment on An Earth-sized rogue planet discovered in the Milky Way. Parent comment

Re:An Earth-sized rogue planet discovered in the Milky Way by mturmon on Saturday October 31, 2020 @04:38PM (#24955006)
We used to think the composition of the Sun would never be known because there was no way to take a sample. Now, because of spectroscopy, we know the composition of the Sun and all the planets. We’re pretty clever when we put our minds to something.
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