| Quasar | | galxies which are extremely powerful emmiters of radiation. |
| Airglow | | A lighter part of a shadow forund on the shadows edge. |
| Parsec | | A super bright exlposion if a star. |
| Nebula | | The line between day and night on a celstial object |
| Direct Motion | | Objects moving around the sun in the same direction of the earth. |
| Limb | | The point directly above yourhead in the night sky. |
| Binary Star | | Cloud of ionized hydrogen. |
| Sun Spots | | A region of the earths atmosphere. |
| Zenith | | The dark inner part of a sunspot or shadow. |
| Teminator | | A very distant immensley bright object. |
| Red Shift | | The point on the celsetial sphere directly below the observer |
| Umbra | | An object from outer space such as a rock that falls into the earth. |
| Supernova | | The point in an objects orbit around the earth, when it is farthest away from the earth. |
| Penumbra | | The apparent motion of the sky from east to west caused by the earth moving east to west. |
| Earthshine | | A group of stars gas and dust held together by gravity. |
| Apogee | | The period between new moons. |
| Flares | | A brilliant meteor whivh may exlpode during the descent of the earths atmosphere. |
| Galaxy | | The edge of any object in outer space. |
| Exospere | | The hazy looking patch surrounding the nucleus of a comet. |
| Corona | | A cloud of gas and dust. |
| HI Region | | The natural glow of the night sky due to reactions that take place in the earths upper atmosphere. |
| Diurnal Motion | | .The outermost part of the suns surface. |
| Ionosphere | | A star which is actually made up of two stars orbiting each other. |
| Coma | | Dark patches on the suns surface. |
| Meteor | | The outermost part of the earth's atmosphere. |
| Gamma Ray | | 3.26 lightyears. |
| Radio Galaxies | | Mercury and venus which lie closer to the sun than the earth. |
| Bolide | | The faint glow of the moon when the side facing the earth is dark. |
| Inferior Planets | | Extremely short wavelength, and energetic electromagnetic radiation. |
| Minor Planet | | beautiful eruptions in the outermost part of the sun's atmoshere. |
| Ozone | | Cloud of nuetral hydrogen. |
| HII Region | | An area in the earths upper atmosphere which absorbs many of the lethal radiations coming from outer space. |
| Lunation | | Asteroid. |
| Nadir | | When an object is traveling away from the earth the light makes it looked stratched out making it look redder. |
