click below
click below
Normal Size Small Size show me how
Stars & Galaxies
vocabulary words
Term | Definition |
---|---|
Constelation | Patterns of stars in the night sky |
Absolute Magnitude | The measure of the amount of light it gives off. |
Apparent Magnitude | A measure of the amount of light received from a star on light from Earth. |
Light Year | Distance that light travels in one year. 300,000 km/s |
Photosphere | The lowest layer of the Suns atmosphere - the layer from which light is given off. |
Chromosphere | The layer of the Sun above the photosphere. |
Corona | The largest layer of the Sun's atmosphere; extends millions of kilometers into space. |
Sunspots | The areas that appear dark on the sun; they are cooler than the area surrounding the spot. |
Nebula | A large cloud of dust and gas where stars begin to form. |
Giant Star | A star that is in the late stage of its life cycle |
White Dwarf | A star about the size of Earth, eventually it cools and stops giving off light. |
Super Giant | A massive star that continues to heat up and contains very heavy elements that form by fusion. |
Neutron Star | The core of a star that has collapsed and only neutrons exist. |
Black Hole | The core of a supernova that has collapsed inward on itself - gravity is so great not even light can escape. |
Galaxy | Large group of stars, gas, and dust held together by gravity. |
Big Bang Theory | The leading theory about the formation of the universe. |