Kepler mission of the U.S. space agency (NASA) ensure've found two Earth-sized planets orbiting a star like the Sun in our solar system, according to NASA as quoted by Reuters on Thursday (22/12).
NASA called this discovery is a milestone in the search mission Earth-like planets. Both planets are named Kepler and Kepler-20e-20F is the smallest planets outside the solar system which was confirmed around a Sun-like star, according to NASA.
Both the new planet is too close to their stars, to be called were in the zone occupied decent living (habitable zone) where there is liquid water on the surface of the planet.
"This discovery shows for the first time that Earth-sized planets around other stars (out of the Sun) and that we are able to detect it," said Francois Fressin of the Harvard-Smithsonian Center for Astrophysics in Cambridge, Massachusetts.
Both the new planet is believed to be a rocky planet. Kepler-20e somewhat smaller than Venus, with a radius 0.87 times of Earth's radius.
Kepler-20F slightly larger than Earth with a radius of 1.03 times of the Earth. Both of these planets are in the system of five planets that are named after Kepler-20, whereas the distance is 1,000 light-years away in the constellation Lyra.
Kepler-20e orbits its star every 6.1 days, while Kepler-orbiting every 19.6 hari.Kepler 20F-20F, a temperature of 800 degrees Fahrenheit, similar to the average day of the planet Mercury.
The temperature at the surface of the Kepler-20e which reached more than 1,400 degrees Fahrenheit, to melt the glass.
Kepler space telescope to detect planets and planetary candidates by measuring the light power more than 150,000 stars as planets pass in front of their stars.
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