Who studies objects in space, such as black holes, galaxies, moons, planets and stars?

The study of celestial objects, space, and the universe as a whole.

A theory that says the universe began as a small point that expanded rapidly about 13.7 billion years ago.

A large grouping of stars in space.

A model showing Earth located at the center of the universe.

A model showing the Sun as a fixed point in the center of the universe, with objects revolving around it.

The galaxy in which Earth and the Sun are located.

A curved path followed by a satellite as it revolves around an object.

A star and the group of planets and other celestial bodies that are held by its gravitational attraction and revolve around it.

All of space and the matter space contains.

The layer of gas surrounding a planet that is held in place by gravity.

A feature that helps identify something.

The general makeup of something.

In comparison to something else.

A large celestial body that revolves around a star in a solar system.

Interior planets made mostly of rock, Earth-like.

Outer planets made mostly of gases.

Large and small rocks or metallic masses orbiting the Sun; made up of materials similar to those that formed the planets

A celestial body of ice, dust, and rock with an elongated and elliptical orbit.

A natural chunk of rock or dust existing outside Earth’s atmosphere.

Remains of a meteoroid that strike the surface of a planet or moon.