Astronomy - Crossword

2. The force that keeps planets in orbit around the Sun is
7. The longest phase in a star’s life cycle is the __________ stage.
12. The movement of Earth around the Sun is called
13. The path a planet follows around the Sun is called
15. The imaginary flat surface on which planets orbit the Sun is called
16. A telescope that uses mirrors instead of lenses is a __________ telescope.
17. The planet known for having the strongest winds is
19. When the Moon blocks sunlight from reaching Earth, the event is called

1. The bending of light as it passes through different materials is called
3. A large system of billions of stars, gas, and dust held together by gravity is called
4. The four planets closest to the Sun are known as the __________ planets.
5. The force created by the outward push from a rotating system is called __________ force
6. The layer of gases surrounding Earth is called
8. The darker inner part of a sunspot is called the
9. Jupiter, Saturn, Uranus, and Neptune are classified as __________ planets.
10. A small, icy body with a glowing tail when near the Sun
11. The explosion that marks the death of a massive star
14. The movement of a planet spinning on its axis is called
18. The boundary that marks the edge of the Sun’s influence is known as
20. The closest star to Earth is