Gliese 581 c is described as one of the most promising exoplanets to sustain life. In this New York Times article, Dimitar Sasselov says: "It’s 20 light-years. We can go there."
What does he mean by that?
It would take roughly 40000 years with the fastest thing we've got today if I'm not mistaken?
I do understand that he's not talking about a crewed space mission!