| A | B |
|---|
| waxing moon | growing larger each night |
| waning moon | getting smaller each night |
| vacuum | no air |
| asteroid | chink of rock between mars and jupiter |
| lunar | having to do with the moon |
| constellation | group of stars |
| orbit | the path of a planet around the sun |
| comet | ball of rock and ice that passes close to the sun and flies far out into the solar system again |
| meteor | another name for a shooting star |
| meteorite | a meteor that actually hits the earth |
| equinox | day and night are equal length |
| solstice | the longest or shortest days of the year |
| solar system | the sun and everything that orbits around it |
| light year | the distance light travels in one year |
| zodiac | can always find the sun and planets in these 12 special constellations |
| Tycho Brahe | had a gold and silver nose "Observe |
| Johann Kelper | discovered that the orbit of mars was an ellipse (oval) |
| cresent | moon |
| gibbous | moon |
