| A | B |
|---|
| seasons | result of the Earth's tilt as it orbits the Sun |
| night & day | caused by the rotation of the Earth on its axis |
| gravity | force or pull of a planet |
| telescope | instrument that magnnifies the appearance of distant objects in the sky |
| Sun | a star at the center of our solar system |
| orbit | path a planet or moon takes around another body in space |
| satellite | moon or manmade object that orbits a planet |
| sunlight | energy that comes from the Sun and provides us with heat & light |
| moonlight | comes from the sunlight reflected by the moon |
| astronaut | person who travels in space |
| Mercury | first planet from the Sun |
| Venus | planet that is sometimes called the Earth's twin |
| Earth | only planet that we know of that has life |
| Mars | the last of the inner planets |
| Jupiter | largest of the gas giants |
| Saturn | planet with the most rings and moons |
| Uranus | seventh planet from the Sun |
| Neptune | farthest gas giant from the Sun |
| Pluto | last known planet in our solar system |
| Milky Way | name of our galaxy |
