| A | B |
|---|
| Gravity | force of attraction to objects of larger mass |
| inertia | tendency of an object to keep its current action |
| satellite | an object that orbits another object |
| asteroids | rocky objects between Mars & Jupiter |
| meteors (meterites) | particles that fall into our atmoshpere & burn up (or hit earth) |
| comets | icy objecs with eccentric orbits |
| stars | large celestial body that creates its own energy/light |
| Nuclear Fusion | helium is formed when 2 hydrogen atoms bond together |
| Main Sequence star | average tempeature & brihtness |
| red giants | cool & bright & huge |
| white dwarfs | hot ¬ so bright & smalls |
| supergiants | very bright many colors |
| sunspots | cool spots due to solar flares 11yr cycle |
| galaxy | huge collection of stars spiral, elliptical, irregula |
| red shift | proves univers is expanding |
| big bang | the universe was created for the explosion of an incredibly dense ball of matter |
