| A | B |
|---|
| orbit | path of object in space |
| solar system | Sun, planets and other objects |
| galaxy | millions or billions of stars held together by gravity |
| universe | space, matter and energy all together |
| constellation | group of stars that form a pattern in the sky |
| electromagnetic radiation | energy that travels across distances as waves |
| spectrum | range of visible colors |
| wavelength | distance between wave peaks |
| telescope | device that we use to see objects far away |
| satellite | object that orbits a more massive object |
| space station | satellite in ehich people can live and work for long periods of time |
| lander | a craft lands on a planet's surface |
| probe | a craft that travels through the atmosphere of another planet |
| impact crater | when an object stirkes the surface of a larger object and forms a round pit |
