ACHIEVMENTS OF NASA’S KEPLER
Technology is
developing at a faster rate. So for our knowledge is concerned there is life in
the planet Earth only. Earth is only a planet of our star known as Sun, which
also has 7 more planets (not considering Pluto as a planet). For the creation
of life that is similar to that as on Earth there should be similar conditions
as on Earth. There are no such conditions in other planets revolving around the
sun.
Since the Sun is
a star in our galaxy Milky Way, and there are many stars in it and at least
some stars may be having planets that support life with suitable conditions.
Besides this there are numerous other galaxies with millions of stars. There
may be life in any planet revolving around any star in the universe. For
several years people have seen flying saucers coming around Earth and going out
of reach of human technology. This also leads to suspicion that intelligent
life, even superior to human life exists somewhere in the universe.
This led into the
investigation in search of exoplanets (planets outside the solar system). One
such famous investigation is done by NASA’s KEPLER. It was launched in March
2009 from Colorado as first planet hunting mission with the cost of $600
million. The telescope’s heliocentric orbit from Earth was 150 million km. It
investigated stars for about 9 years and ran out of fuel on 19th
October 2018. 530506 stars were spotted and 2681 exoplanets were found, apart
from 2899 more that require confirmation. It also found 30 earth sized
exoplanets in habitable zones. 70% of known exoplanets have been found by Kepler.
KEPLER22B: One of
the Kepler’s biggest finds, spotted in 2011 about 600 light years away (one
light year is the distance travelled by light in one year at the speed of
300000 km per second) from us. It has a radius of 2.5 times bigger than Earth
and is in the habitable zone. Further studies found it is likely covered in
water and has a water vapour atmosphere making it a prime candidate for hosting
life.
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