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), the physics, chemistry, and evolution of such objects, and phenomena that originate outside the atmosphere of Earth. It encompasses all objects in outer - space.

Answer:

The study of all objects in outer space