What is the smallest star that we know of?



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    The smallest stars in the universe are red dwarf stars, none of which have a total mass more than half that of the sun. The smallest star that has been measured accurately be astronomers so far is the red dwarf OGLE-TR-122b. This star is only about 20% bigger than the planet Jupiter; however like other stars, it is very dense internally and still has a mass more than ten times that of Jupiter. OGLE-TR-122b has a mass of just over 7% that of the sun. However, it is possible in theory for a star to be even smaller than that, so smaller stars are likely to be discovered in the future.

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