Submitted by GullyShotta t3_ycxpjb in space
iiJokerzace t1_itpwahi wrote
Reply to comment by mrmitchs in Scientists discover a marshmallow-like fluffy planet in deep space | Mashable by GullyShotta
They use the light that comes from it. The rays bouncing off those objects have information that tells astrophysicists what the objects are made of.
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