Meaning & use
astronomy
The scientific study of stars, planets, and other objects in outer space.
See it in a sentence
She majored in astronomy because she was fascinated by distant galaxies.
Astronomy relies on powerful telescopes to observe objects billions of light-years away.
A note on using this word
Astronomy is a physical science, unlike astrology, which is a belief system with no scientific basis.
Words with a similar meaning
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