astronomy

2. Now called a dwarf planet.
3. way Our solar system is part of this galaxy.
5. The largest planet in our solar system.
8. system T he collection of 8 planets and their moons in orbit round the Sun, together with smaller bodies.
9. The branch of science dealing with celestial objects , space and the physical universe as a whole.
11. Covers 70% of Earth’s surface.

1. An event in which two or more bodies exert forces on each other in a short time. It is closer in meaning to impact.
3. closest planet to the Sun.
4. Layer of gas that surrounds a planet.
6. The force that keeps a planet moving and not falling.
7. Small particles of masher in the solar system that enter Earth’s atmosphere and can be bright light in the night sky, also known as shooting stars.
10. Named the red planet.