We’ll know if life exists in a decade, but it is likely to take hundreds of thousands of years to reach the system Seven Earth-like planets have been discovered orbiting nearby dwarf star ‘Trappist-1’, and all of them could have water at their surface, one of the key components of life. Researchers claim that they will know whether or not there is life on any of the planets within a decade, and said ‘this is just the beginning.’