1.
A person trained to travel and work in space.
2.
A region in space where gravity is so strong, not even light can escape.
3.
A ball of ice and dust that glows and has a tail when near the Sun.
4.
A massive system of stars, gas, and dust held together by gravity.
5.
The invisible force that pulls objects toward each other.
6.
A space rock that burns brightly when it enters Earth’s atmosphere.
7.
A natural satellite that orbits a planet, especially Earth.
8.
A colorful cloud of gas and dust where stars are born.
9.
The path one object takes as it moves around another in space.
10.
A large body that orbits a star and doesn’t produce its own light.
11.
A vehicle that uses thrust to break free from Earth’s gravity.
12.
An object that orbits a planet; can be natural or man-made.
13.
Relating to the Sun or its energy.
