What are constellations?. Physics & Astronomy

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

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

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