Astronomy Terms

2. The force of gravity depends on the mass of the objects and the distance between them.
5. An instrument that collects electromagnetic radiation from the sky and concentrates it for better observation
6. A theory that describes the explosive birth of the universe from the observed expansion of the universe, cosmic background radiation, an abundance of the elements, and the laws of physics.
8. Mercury, Venus, Mars, and Earth.
11. The belief that the Earth is the center of the universe.
13. The fully shaded inner region of a shadow cast by an opaque object.
14. When the Moon comes between the Earth and Sun and the shadow of the Moon falls on part of Earth.

1. Jupiter, Saturn, Uranus, or Neptune.
3. Who showed that all objects in the sky attract each other through gravitational force.
4. The belief that the Sun is the center of the universe.
7. A change in the sunlight area of a celestial body seen from another.
9. The area where asteroids orbit which is between Mars and Jupiter.
10. When Earth comes between the Sun and the Moon and the shadow of Earth falls on the Moon.
12. A small body of ice, rocky and cosmic dust that follows an elli[tical orbit around the Sun.
15. When the shadow of one celestial body falls on another