ARE WE ALONE IN THE

UNIVERSE?

        European scientists recently have discovered 42 new exoplanets. An exoplanet (or extrasolar planet) Is a planet orbiting a star different form the sun. The prefix  ‘exo’ prefix means ‘outside’ in Greek.

        The discovery includes three ‘super-Earth’ orbiting a single Sun- like star. The planets are less 30 times the mass of Earth. All orbit very close to their stars. Hence, they are consider too hot to support any kinds of larger life.

         It was only in 2005 that the first  earth – sized exoplanet was discovered. However, it was only in April 2007 that the first earth – sized exoplanet was discovered in the so – called habitable zone. (The habitable zone in the distance from a star that provides temperatures at which liquid water is stable). More than 245 exoplanets have since been discovered.

       The search for exoplanets is one of the most exciting fields in astronomy. The discovery demonstrates that planets keep popping up in unexpected places around the universe. It will answer the question one day of whether we are alone in the universe.

      The extrasolar planets using the HARPS instrument on the 3.4 meter telescope at the European Southern Observatory in Chile.

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