Astronomy

3. Higher frequency (Visible or Infrared)
7. Something that causes or helps a reaction to occur, but is not itself consumed as part of the reaction
9. A push or pull in any direction
11. The rate of change of velocity of a moving object.
13. Branch of Science dedicated to the study of everything in the universe above Earth’s atmosphere
15. Causes day and night for Earth

1. Region of the electromagnetic spectrum with the longest wavelength
2. The gravitational force exerted on you by Earth (or the planet on which you happen to be standing)
4. The distance that light travels in one year
5. Gravitational bound collection of a large number of stars. The Sun is a star in the Milky Way Galaxy.
6. founded theory that light moves at a constant speed
7. Appearance of the Moon (or a planet) when less than half of the body’s hemisphere is visible from Earth
8. A glowing ball of gas held together by its own gravity and powered by nuclear fusion in its core
10. The apparent path of the sun around the Earth
12. The 12 constellations on the celestial sphere through which the Sun appears to pass during the course of a year
14. Distance moved per unit of time