Which is a compound? A) Kr B) O2 C)Cl2 D)CuF2
2 answers:
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Answer:
The correct answer is D.They have stars that may appear to wobble.
Explanation:
Binary star - Wikipediaen.wikipedia.org › wiki › Binary_star
''Astronomers have discovered some stars that seemingly orbit around an empty space. Astrometric binaries are relatively nearby stars which can be seen to wobble around a point in space, with no visible companion. The same mathematics used for ordinary binaries can be applied to infer the mass of the missing companion''
<em>-Wikipediaen.wikipedia.org › wiki › Binary_star</em>
<em>-Edge 2021</em>
<em>might be a lil late but YW
