Question

1. the science of astronomy had many breakthroughs during the renaissance. what did astronomers study?

the human body
animals
the elements
the stars and outer space

Explanation:

Astronomy is the scientific study of celestial objects (such as stars, planets, comets, and galaxies) and phenomena that originate outside the Earth's atmosphere. So astronomers study the stars and outer space. The human body is studied in medicine/anatomy, animals in zoology, and elements in chemistry.

Answer:

The stars and outer space