 | Term | Definition |
| | meteor | another name for a shooting star |
| | Yuri Gargarin | first human in space |
| | Jupiter | the largest planet,has a red spot |
| | White Dwarf | an old, cold star |
| | asteroids | bits of space rock between Mars and Jupiter |
| | Pluto | the smallest, coldest planet |
| | Sun | closest star to earth |
| | Mercury | scorched planet, closest to sun |
| | Gravity | a force caused by mass |
| | Supernova | an old star that is dying, very bright, exploding star |
| | Mars | the red planet, half the size of Earth |
| | Sputnik | the first man-made satellite in space |
| | Solar System | all things that orbit the sun |
| | Orion | a constellation of a hunter in space |
| | Venus | the morning star |
| | The Milky Way | the name of the galaxy that the earth is part of |
| | constellation | a pattern of stars in the sky |
| | galaxy | a group of about 100 billion stars |
| | space | no air to breath, weightlessness, cold, no food or water |
| | Black Hole | formed when a star has such a large mass and gravity that not even light can escape from it |
| | Yellow star | a young star |
| | Arcturus | an example of a red giant |
| | The Moon | has many craters, because there is no atmosphere to burn up the asteroids before they hit |
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