Discovered: Two Earth-Sized Planets Around A Sun-Like Star
By on December 20th, 2011

Scientists report the finding of true two Earth-sized planets orbiting a star very similar to the sun, using the Kepler telescope. The discovery was announced today. Named Kepler 20e and Kepler 20f, these are the smallest planets ever to be discovered.

An artist's impression of Kepler 20e. Image Courtesy: NASA/JPL/Caltech

The location and details

The stellar system is located 950 light years away from Earth. Both planets are about the size of Earth, with one of them being slightly smaller. This is important, since we now know that we can indeed detect planets the size of Earth in another stellar system. In the future, we might indeed stumble upon a planet, the size of the Earth, with conditions similar to our home.

The planets orbit the star a bit too close for comfort and the surface temperature is too hot to sustain the kind of life we know. It’s not a true twin of the Earth, but this does indeed bring us tantalizingly close to finding one.

+2 for Kepler

This is again a feather in the burgeoning cap of NASA’s Kepler space telescope, which was recently lauded for finding a planet, called Kepler 22b, orbiting another star in the Goldilocks region.

Both Kepler 20e and 20f are rocky planets and have an estimated mass of 1.7 times and 3 times the mass of the Earth respectively. While Kepler 20e lies at a distance of 7.5 million km away from the sun, making it 20 times as close to the star as Earth (150 million km), Kepler 20f, does slightly better at 16.5 million km. Kepler 20e takes a mere 6.1 days to complete an orbit around the star, while Kepler 20f takes 19.6 days.

There is no possibility of liquid water, or even an atmosphere on either of the planets. However, astronomers are hoping that, given the plethora of exoplanets being discovered, one will turn out to be just right’ for life.

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Author: Debjyoti Bardhan Google Profile for Debjyoti Bardhan
Is a science geek, currently pursuing some sort of a degree (called a PhD) in Physics at TIFR, Mumbai. An enthusiastic but useless amateur photographer, his most favourite activity is simply lazing around. He is interested in all things interesting and scientific.

Debjyoti Bardhan has written and can be contacted at debjyoti@techie-buzz.com.
  • http://www.cardpaymentoptions.com Eric Stauffer

    This is pretty amazing stuff, but anyone that follows this science is not surprised. The advancement in space technology over the last 10 years has been great and it was only a matter of time before we started finding these planets. The next 100 years will be incredible to watch as we discover more about the universe, for those lucky enough to be around for a good chunk of it.

 
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