What are constellations?. Physics & Astronomy

2019-11-20 20:49:18
Physics & Astronomy

Groups of galaxies gravitationally bound and close together in the sky
Groups of stars making an apparent pattern in the celestial sphere
Apparent groupings of stars and planets visible on a given evening
Groups of stars gravitationally bound and appearing close together in the sky
Ancient story boards, useless to modern astronomers

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