Human being has not been extinguished. He is now isolated because of his untamed curiosity.
Planet earth retains just a few glimpses of human presence. The rest is there, floating.
The crews observe the celestial bodies and take a debate on if to continue or try to do base on any of those moons.
The lack of oxygen makes it unlikely any attempt to survive in the vacuum.
Human being has done it. He has been able to begin its return to the great stardust mass.