space

2. A massive collection of stars, dust, and gas held together by gravity. Galaxies can be spiral, elliptical, or irregular in shape.
4. A cloud of gas and dust in space. Nebulas are often the birthplaces of stars and can have beautiful, colorful shapes and patterns.
5. A small rock or particle in space. When a meteoroid enters Earth's atmosphere and burns up, it is called a meteor.
7. An instrument used to observe distant objects in space. Telescopes gather and focus light, allowing us to see celestial bodies more clearly.
8. The curved path followed by an object, such as a planet or a satellite, as it revolves around another object, usually a star.
10. A person who travels and works in space. Astronauts undergo extensive training to be able to live and work in microgravity conditions.

1. A large celestial body that orbits around a star. Planets are round and do not produce their own light but reflect the light of the star they orbit.
3. A celestial object made up of ice, dust, and gas that orbits the Sun. When a comet gets close to the Sun, it develops a glowing coma and a tail.
6. A vehicle that is propelled by engines and carries spacecraft into space. Rockets provide the necessary thrust to overcome Earth's gravity.
9. Hole A region in space with extremely strong gravity that nothing, not even light, can escape from. Black holes form when massive stars collapse.
11. System A system consisting of a star (the Sun) and the celestial objects that orbit around it, including planets, moons, asteroids, and comets.