Researchers at the Palomar
Observatory, Caltech, USA, have
recently reported the coolest brown
dwarf with the lowest mass. Brown
dwarves are star-like objects which
have a mass less than 0.08 times that
of the sun and are unable to sustain
the thermonuclear reactions in their
interiors.
Most of their gravitational
energy is radiated away relatively
rapidly, leaving behind a very dim
object. From observations of about
100 stars in a carefully determined
sample, scientists have discovered a
probable companion of the star
GI229, which is a brown dwarf.
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