The social network is teaming up with National Geographic to promote the launch. Tomorrow, December 13th at 12pm ET, NatGeo will broadcast live from its Mars Desert Research Station facility in Utah, where, for the past 80 days, eight space scientists have been living in artificial habitats that replicate life on the Red Planet.

The Live 360 feature won't be everywhere to start. Facebook plans to slowly roll it out to select Pages in the coming months before broadening its distribution to both Pages and user Profiles by the end of next year.