Question

what is astronomy? *
the study of plants and animals
the study of only earth
the study of all objects in outer space
the study of only stars

Explanation:

Astronomy is the scientific study of celestial objects (such as stars, planets, comets, and galaxies), space, and the universe as a whole. It encompasses all objects in outer - space, not just stars, and is not about plants, animals, or only Earth.

Answer:

The study of all objects in outer space