Across
- 5. The curved path that a planet, moon, or spacecraft follows as it travels around a star or planet.
- 7. An optical instrument designed to make distant objects in space appear nearer and larger.
- 8. An object that moves around a larger object in space; the Moon is Earth's natural example.
- 10. A small, rocky object that orbits the Sun, mostly found in a large "belt" between Mars and Jupiter.
Down
- 1. The invisible force that pulls objects toward each other and keeps planets orbiting the sun.
- 2. A giant cloud of dust and gas in space, often known as a "star nursery" where new stars are born.
- 3. A person who is trained to travel in a spacecraft and explore outer space.
- 4. A cosmic snowball of frozen gases, rock, and dust that develops a glowing tail when it passes close to the Sun.
- 6. A streak of light in the sky, often called a "shooting star," caused by a space rock burning up in Earth's atmosphere.
- 9. A huge system of millions or billions of stars, together with gas and dust, held together by gravitational attraction.