WATER WORLDS
Saturn’s moon Enceladus and Jupiter’s moon
Europa may support life, because scientists have spotted from their icy shells
NASA scientists guess that more than a quarter
of the several dozen exoplanets they have analysed could be ‘water worlds’
This includes some members of the Trappist -1
system which is about forty light years away
First possible
evidence of an exoplanet was noted in 1917
First confirmation
of detection occurred in 1992. This was followed by the confirmation of a
different planet, originally detected in 1988
In 2013 the colour
of an exoplanet was determined for the first time
Exoplanets magnetic
fields may be detectable by their auroral radio emissions with sensitive enough radio telescopes such as LOFAR
Radio emissions
could enable determination of the rotation rate of the interior of an exoplanet
About 97% of all
the confirmed exoplanets have been discovered by indirect techniques of
detection, mainly by radial velocity measurements and transit monitoring
techniques. Recently the techniques of singular optics have been applied in the search for exoplanets
There are many methods of detecting exoplanets. Transit photometry and Doppler spectroscopy have found
the most
Discovery of
exoplanets has intensified interest in the search for extraterrestrial life. There is
special interest in planets that orbit in a star's habitable zone, where it is possible for liquid water, a prerequisite for life on Earth, to exist on the surface.
No comments:
Post a Comment