Why we will not live right away on Proxima B ?

To know that it exists is great. But from there to move in, better not to count on it right away.

The discovery of Proxima B, the planet closest to the Earth outside those of the solar system, is certainly encouraging.

To travel the forty thousand billion kilometers that separate us from Proxima B, it is estimated, Michael Gillon, 50,000 years aboard a space shuttle equipped with current technology. Even at the speed of a space probe like Helios, the fastest object ever built by man (70 km / s), it would take another 18,000 years. The only reasonable hope for the astrophysicist: "Mastering nuclear fusion", a technology that would reach 30,000 km / s and approach Proxima B in forty years.