Matt Damon wants to go into space.

The 'Martian' actor wouldn't want to be one of the first to explore life on other planets, but he'd like to go on an intergalactic adventure at some stage and thinks it would be the best way to save Earth from extinction.

Asked if he would go into space, he said: ''I think so down the line. I'm not one of these guys who wants to go colonise mars in the first wave of people.

''I think we have to get off the planet so we can protect the species from one extinction level event.''

In 'The Martian', the 44-year-old actor - who raises daughters Alexia, 16, Isabella, nine, Gia, seven, and Stella, four, with wife Luciana - plays an astronaut who gets left behind on Mars alone, and he had to spend five weeks shooting with no other actors on set.

And Matt admitted he would love to get a little bit more alone time in his personal life.

He laughed to 'Entertainment Tonight Canada': ''I love being with my kids but you can attest to the fact that you would take a day alone now or then if you could get it.

''I wouldn't want to be alone for more than a day or two..I think a day would be good. You kind of re-set , re-charge.''