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Results tagged with stars
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user 258769
Stars are astronomical bodies that are (usually) mainly composed of Hydrogen, Helium, and Lithium. They are massive enough that their gravity compresses the matter to the point where nuclear fusion occurs, which creates a lot of heat and tends to make stars output radiation along a blackbody curve. Typically the radiative output is significant in the visible spectrum making stars very bright objects.
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Investigating colour of a star when in motion [closed]
The star Alpha Centauri is 4 light years from Earth. For an astronaut travelling at $c/2$ from
Earth to Alpha Centauri. So, this apparently means
The colour of a distant star perpendicular to the dir …
