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Astronomers discover rocky planet outside solar system
Neetu Banga | 11 Jan 2011

The size of planet is measuring 1.4 times the size of earth and its mass is 4.6 times that of Earth and an average density of 8.8 grams per cubic centimetre.

ASTRONOMERS HAVE discovered a rocky planet outside our solar system and named it Kepler-10b. The discovery is based on eight months of data collected by the spacecraft since May 2009 to January 2010. The size of planet is measuring 1.4 times the size of earth and its mass is 4.6 times that of Earth and an average density of 8.8 grams per cubic centimetre.  The planet orbits once every 0.84 days and is more than 20 times closer to its star than Mercury is to our sun and not in the habitable zone.
 
It is one of brighter stars being targeted by Kepler, the NASA team was able to detect was able to detect high-frequency variations in the star's brightness generated by stellar oscillations. The scientist also got so many information during Kepler mission and which will allowed them to pin down its properties and function. Kepler is the first NASA mission capable of finding Earth-size planets in or near the habitable zone, the region in a planetary system where liquid water can exist on the planet's surface.