The UEA say life on earth will end, and we may need to consider living on other planets.
Almost 1,000 planets outside our solar system have been identified by astronomers.
The team of astrobiologists looked at some of these to find out which were best placed to support life.
They found that the recently discovered Gliese 581d could be warm and pleasant for up to 54.7 billion years - 10 times longer than our solar system.
– Andrew Rushby
To date, no true Earth analogue planet has been detected.
But it is possible that there will be a habitable, Earth-like planet within 10 light-years, which is very close in astronomical terms.
However reaching it would take hundreds of thousands of years with our current technology.
"If we ever needed to move to another planet, Mars is probably our best bet.
"It's very close and will remain in the habitable zone until the end of the sun's lifetime - six billion years from now."