| A | B |
|---|
| Celestial body | natural body in space |
| Constellations | patterns made up of stars |
| Aristotle | geocentric model of the universe |
| Astrolabe | device used to predict position of stars |
| Copernicus | heliocentric model of the universe |
| Solar Flares | eruptions of gas on the suns surface |
| Sunspots | suns surface where temperature is ~3500°C |
| Astronomical Units | measure of distance in space |
| Asteroids | mostly found between Mars and Jupiter |
| Comets | dirty snowballs |
| Meteorite | meteoroid that hits the Earth |
| Rovers | programmed robots used for space exploration |
| Optical telescope | • Use lenses to gather and focus light |
| Radio Telescope | Collects longer wavelengths and focuses them on a receiver |
| Meteoroid | chunk of rock floating through space |
| Mercury | planet closest to the sun |
| Neptune | planet furthest from sun |
| Saturn | planet with a ring |
| Mars | Red planet |
| Sun | makes up 99% of the mass in our solar system |
