| A | B |
| BLUE SHIFT | caused my stars moving toward us |
| ELLIPSE | oval shape of a planet's orbit around Sun |
| FOCI | 2 dots inside the ellipse (sun is at one of them) |
| BIG BANG THEORY | universe started in giant explosion |
| ECCENTRICITY | numerical value for how oval-shaped an ellipse is |
| ASTEROIDS | orbit the sun between Mars and Jupiter |
| METEOR | a "shooting star" |
| COMET | orbits Sun in very elliptical orbit ("dirty snowball") |
| RED SHIFT | caused by galaxies moving away from us |
| FUSION | type of nuclear reaction happening on Sun |