It’s actually a planet by name “55 Cancri e” orbiting a star in Cancer constellation.
Its mass is about 7.8 Earth masses and its diameter is about twice that of
Earth's. "55 Cancri e" was discovered on August 30, 2004 but its discovery was
challenged in 2005. Recently further information about the plannet has been
given by the scientists. The most interesting information is that at least a
third of the planet's mass, the equivalent of about three Earth masses, could
be diamond (Estimated by a study - with Olivier Mousis at the Institut de
Recherche en Astrophysique et Planetologie in Toulouse, France ).
"The surface of this planet is likely covered in graphite and diamond
rather than water and granite," said Nikku Madhusudhan, the Yale
researcher whose findings are due to be published in the journal Astrophysical
Journal Letters.
"This is our first glimpse of a rocky world with a fundamentally
different chemistry from Earth," Madhusudhan said, adding that the
discovery of the carbon-rich planet meant distant rocky planets could no longer
be assumed to have chemical constituents, interiors, atmospheres, or biologies
similar to Earth.
Reading up to this if diamond lovers are thinking of a voyage for
excavating the diamonds present in the planet here is another information about
‘55 Cancri e’. Its surface temperature is about 1,648 degree Celsius (3,900 degrees Fahrenheit)
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