|
 Asteroid | Rocky and metallic objects located in the belt between Mars and Jupiter |
| Comet | Composed of dust, rock particles, and frozen gases and has a nucleus, coma, and tail |
| electromagnetic spectrum | Arrangement of electromagnetic radiation |
| meteor | Meteoroid that burns up in the Earth's atmosphere; also known as a shooting star |
| meteorite | Meteroid that has hit the Earth's surface |
| meteoroid | Rocky debris in the Solar System |
| orbit | Curved path a satellite around Earth |
| rocket | Motors that don't require air to burn |
| satellite | Any object that orbits the earth |
| shield | Object that blocks radiation |
| space probe | Unmanned spacecraft that is sent into space to collect information and transmit it back to earth |
| telescope | Instrument used to view space |
| observatory | Location where many optical telescopes that professional astronomers use are housed |
| Space Shuttle | Reusable spacecraft that glides back to Earth after is leaves orbit and can carry a number of astronauts and provides a place to work |
| Reflecting telescope | Optical telescope that uses concave mirrors to focus light from objects |
| Refracting telescope | Optical telescope that uses a convex lense to focus light |
| Radio Waves | Part of the electromagnetic spectrum; longest wavelength |
| Hubble Telescope | Optical telescope in orbit around earth |
| Radio Telescope | Telescope used to study radio waves |
| John Glenn | First American to orbit the Earth |
| Yuri Gargin | First human in space |
| Project Gemini | One of the goals was to connect two spacecrafts in space |
| Project Mercury | First program in our attempt to put a man on the moon |
| Neil Armstrong | First human to step on the moon. |
| Gamma Rays | Electromagnetic waves with the shortest wavelength |
| Visible light | Portion of the electromagnetic spectrum that we can see with the naked eye |
| Mercury | Heavily cratered planet that is closest to the sun |
| Astronomical Unit | Average distance between the Earth and the Sun |
| Mars | Reddish-brown planet that has large amounts of iron oxide and polar ice caps |
| Jupiter | Largest of the gaseous planets that has a large storm |
| Venus | Very hot planet with sulfuric acid in its clouds |
| Neptune | Planet that is close in size to Uranus |