Asteroid Alert

2. a system of millions of stars, and huge clouds of dust and gas, held together by gravity and the force of attraction
3. an adjective used to describe something related to the Moon
7. the group of planets and moons that orbit the Sun
9. a line through the center of an object, such as the Earth, that the object rotates around
10. the property of reflecting light
13. the region in the solar system that contains many asteroids
14. the type of brightness of an object in space that appears at a standard distance of 32.6 light-years or 10 parsecs
16. the phenomenon that occurs when the Sun, Earth, and Moon align on the night of a full Moon, causing the Earth to block light from the Sun and cast a shadow on the Moon
17. one of the distinct shapes of the Moon as seen from the Earth, caused by the position of the Earth, Sun and Moon
18. a large, bowl-shaped hole in the ground normally caused by explosions or impacts
19. a lump of frozen gases, rock and dust that orbits the Sun
21. space debris, a comet, or an asteroid that passes through the Earth's atmosphere

1. a large, spherical object in space that orbits a star and is large enough that its gravity clears other objects from its orbit
4. the type of brightness of an object in space appears from the Earth
5. a natural phenomenon by which all things with mass are brought toward one another
6. an adjective used to describe a substance that has the characteristics of a gas
8. a type of object that exists in the Universe, such as a planet or star, also known as a celestial body
9. a rocky object that orbits the Sun
11. an adjective used to describe something that repeats itself in the same order over a period of time
12. abbreviation for an object in space, such as an asteroid, whose orbit will bring it close to the Earth
15. a meteoroid that has passed through the Earth's atmosphere and hit the ground
20. a small lump of ice or rock formed when an asteroid or comet breaks apart