| A | B |
|---|
| stars | Glowing balls of hot gas. |
| planets | Large bodies in space that orbit the sun. |
| solar system | The sun, planets and stars. |
| sun | The largest object in our solar system. |
| sunspots | Areas on the sun that give off less energy. |
| asteroids | a rocky object smaller than a planet that orbits the sun. |
| asteroid belt | a large number of asteroids in orbit between Mars & Jupiter. |
| meteor | We know this as a shooting star. |
| Milky Way Galaxy | The group of stars to which our solar system belongs. |
| gravity | A forc of attraction between any two objects caused by the objects pulling on each other. |
| orbit | The path a satellite follows as it revolves. |
| revolution | The movement of one object in its orbit around another object in space. |
| lunar eclipse | a passing of the moon through the earth's shadow. |
| solar eclipse | A passing of the moon between the sun and the earth. |
| atmosphere | An envelope of gas surrounding a body in space. |
| universe | All the galaxies together form this. |
| comet | a ball of ice, rock, frozen gases,and dust that orbits the sun |
| apparent magnitude | how bright a star looks |
| absolute magnitude | how bright a star really is |
| lightyear | the distance ligth travels in one year |
| nebula | a cloud of gas and dust in space |
| red giant | a star whose size expands after it uses up its hydrogen |
| white dwarf | a small, white, hot, dense star |
| super nova | explosion of a super giant |
| constellation | groups of stars in the sky |
| galaxy | a group of billions of stars |
