Dwarf stars
A term commonly applied to the main-sequence stars that are fainter than absolute magnitude +1.
These bodies include the sun also the majority of stars that fall in the main sequence on the Russell spectrum-luminosity diagram.
Danish astronomer Ejnar Hertzsprung first used the term to contrast low-luminosity.
Red Dwarf star Red dwarfs, also known as M stars, are dimer compared to other stars like the sun and just 10 to 20 percent as big.
Now that scientists find other planets may remain habitable farther away from a red dwarf than once thought. This could mean there is a chance that there are far more habitable worlds around red dwarfs.
The habitability of stars depend on how hot or cold it is, which in turn makes it in a large part on how much starlight it absorbs and reflects. Frozen water such as ice and snow reflects light, which means it helps make the planets cooler, including Earth.
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