Nasa research scientist Tom Barclay has said that the hopes of the Kelper team have been answered with the discovery of Kepler-186f.
The discovery of the Earth-like planet orbiting star Kepler has demonstrated the existence of planets that could potentially hold life.
Lewis Vaughan Jones reports:
More top news
At least four people have been killed after gunmen opened fire at government offices in the Mexican beach resort of Cancun.
The mobile phone provider was fined by Ofcom after overcharging around 40,000 customers nearly £250,000 over calling "150."
Colo became a mother of three, grandmother of 16, great-grandmother of 12 and great-great-grandmother of three.