BROWN DWARF TYPE STAR

they do not radiate much light. it is not enough for instance, to
maintain life on planets!
some of them are believed to use a special type of fusion power.
they are much smaller than any normal star.





RED DWARF TYPE STAR

LIFE on red-dwarf planets possible?

they are common! the next one is GLIESE 581C, about 10 light years away.
red dwarf can be upto 30 percent of our sun, usually only 10 percent, or less.
the energy can be 1/1000, or 1/300000 of the sun's energy!

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