Astronomers have discovered what is now the smallest known star in the galaxy, in a system roughly 600 light-years from Earth. Part of a trinary star system, the smaller of the pair, EBLM J0555-57Ab, is estimated to only be 8 percent of the mass of our own Sun, in a compact package no bigger than Saturn.
This itty-bitty sun may represent the smallest size that a star can be: to sustain the hydrogen fusion process that provides a star's energy, the gases within must be brought to a high pressure and temperature, meaning that there needs to be enough mass present in the star to provide these conditions.
This itty-bitty sun may represent the smallest size that a star can be: to sustain the hydrogen fusion process that provides a star's energy, the gases within must be brought to a high pressure and temperature, meaning that there needs to be enough mass present in the star to provide these conditions.
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