Is it time for another 'giant leap?' In 2080, NASA scientists believe we can and must send people to Jupiter's and Saturn's moons. Space Travel Timeline of NASA: Exoplanet robotic missions and base camps on the Moon in the (late) 2020s. A crewed mission to Mars is planned for the late 2030s. Robotic missions to Tau Ceti (11.9 light-years away) in the 2030s. In the 2040s, robotic missions are launched to the TRAPPIST-1 system 40 light-years away. Robotic missions to distant stars in the 2050s. In the 2060s, a crewed mission will be launched to the Asteroid Belt between Mars and Jupiter. Mission to Jupiter (probably Callisto because it is sufficiently removed from Jupiter's intense radiation fields) in the 2070s. Crewed missions to Saturn's moons (likely Titan and/or Enceladus) in the 2080s. We will conduct a crewed mission in 2250 to locate exoplanets such as Proxima Centauri (4.2 light years away). In 2300, a robotic mission is launched to TRAPPIST-1, a system 40 light-years away. A crewed mission to distant stars halfway to the Milky Way's center in the late 2400s. Off-world colonization is a fascinating prospect, but it also carries a dire warning about humanity becoming a multi-world species.