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without from ground-based telescopes and
NASA spritzer telescope astronomers have
made a major discovery detecting seven
earth-like exoplanets orbiting a single
star three of these planets lie in the
habitable zone and as they are rocky
they are likely to have liquid water on
them these exoplanets could be a
significant target to look for alien
life the star is flawed Trappist one
which is a small low mass called dwarf
star located 40 light-years away in the
constellation Aquarius its radius is
only 11% of that of our Sun making it
around the same size as Jupiter the
seven planets orbiting the star are
currently just named b c d e f G and H
they are all thought to be rocky
so could potentially hold liquid water
which is the key to sustaining life and
as a result is what makes them a key tog
in our search for extraterrestrial life
they are extremely close together in
their orbit of the star and all their
orbits would fit inside Mercury's orbit
of our Sun they are close enough
together that you could look up on one
of the planets and see the rest of them
sitting in the sky similar to how the
moon looks to us the length of their
years ranges from 1.5 days - 20 days and
all of them have a side constantly
facing the Sun so one side is always
bathed in Sun and the other in darkness
NASA are launching the James Webb
telescope in 2018 which could further
our knowledge of these planets by
looking out for the chemical signatures
of water methane and oxygen on any of
the planets
this discovery hints that there may be
more solar planets to earth in the
universe than astronomers previously
thought given the prospects of alien
life more promise than ever before
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