Vocabulary Quiz-Wonder of Outer Space

what is a person who studies celestial objects?

the force of attraction between two objects

a huge ball of gas that produces heat and light

everything that exists anywhere

a celestial body that orbits a star and is the only object in its orbit

Theory that a sudden event caused the beginning of the universe

a cluster of millions of stars bound together by gravity

The Spiral galaxy in which our solar system exists

invisible region in space with a strong gravitational field

The largest public space research program