Word | Noun | Adjective | Verb | Adverb |
---|---|---|---|---|
astronomy | Yes | No | No | No |
Oort cloud | Yes | No | No | No |
astronomy (noun) | Oort cloud (noun) |
---|---|
the branch of physics that studies celestial bodies and the universe as a whole | (astronomy) a hypothetical huge collection of comets orbiting the sun far beyond the orbit of Pluto; perturbations (as by other stars) can upset a comet's orbit and may send it tumbling toward the sun |