The team of international scientists, which include Dr Mikko Tuomi of the University of Hertfordshire, also found evidence of a further 54 planets – bringing the total number of potential new worlds to 114.
A hot “super-Earth” with a rocky surface located in the fourth nearest star system to the sun was among the extrasolar planets discovered.
A visualisation of red and blue shifts of starlight caused by a planet’s gravitational pull. (University of Hertfordshire/PA)
Researchers said the planet – named Gliese 411b – demonstrates that “virtually all” the nearest stars to the sun have planets orbiting them and some of these “could be like Earth”.
The results are based on almost 61,000 individual observations of 1,600 stars taken over a 20-year period by US astronomers using the Keck-I telescope in Hawaii.
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