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Stars&Constellations
Stars & Constellations
Term | Definition |
---|---|
Star | A large celestial body that is composed of gas and that emits light;the sun is a typical star. |
Apparent Magnitude | The brightness of a star as seen from Earth. |
Luminosity | The actual brightness of an object such as a star. |
Absolute Magnitude | A measure of how bright a star if it were seen from a standard distance. |
Nebula | A cloud of gas and dust in outer space, visible in the night sky either as an indistinct bright patch or as a dark silhouette against other luminous matter. |
Nuclear Energy | The energy released during nuclear fission or fusion, especially when used to generate electricity. |
Super Nova | A star that suddenly increases greatly in brightness because of a catastrophic explosion that ejects most of its mass. |