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   bacteria      brightness      discovery      dots      environment      heat      life      light      neighbouring      ocean      other      possible      several      similar      sized      structures      surface      view      whether      wonderful  
Ever since the of a new solar system weeks ago, scientists have been discussing planets in the system could contain . Scientists called the system "TRAPPIST-1". It contains a small sun and seven Earth- planets. It is very to our own solar system. NASA scientist Michael Gillon said three of the seven TRAPPIST-1 planets receive as much from its sun as Venus, Earth and Mars receive from our Sun. He said this provides the right for life to exist. TRAPPIST-1 is in a star system called Aquarius. It is nearly 40 -years away from the Earth. Its sun is smaller than our Sun and has just 1/1000th of its , but that could be enough to support life.

Michael Gillon explained that you could see the six planets in the sky if you were on one of the TRAPPIST-1 planets. A planet could look bigger than our of our Moon. Mr Gillon said: "If you were on the of one of these planets, you would have a view of the other planets. You wouldn't see them like we see Venus or Mars, like of light. You would see them really as we see the Moon. You would see the on these worlds." Astronomer Dr Jessie Christiansen said life exists everywhere, "such as that survives in 130-degree caves, or things at the bottom of the where there's no light". She said it could be for life to exist on some of these planets.

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