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Astronomers have confirmed the existence of an Earth-like planet in the "habitable zone" around a star not unlike our own. The planet, Kepler 22-b, lies about 600 light-years away and is about 2.4 times the size of Earth, and has a temperature of about 22C
Methods for slow manned missions
Slow interstellar travel designs such as Project Longshot generally use near-future propulsion technologies. As a result, voyages are extremely long, starting from about one hundred years and reaching to thousands of years.
Crewed voyages might be one-way trips to set up colonies. Nevertheless, serious if preliminary discussions are taking root for the ~100 year time scale, with trials of the MMSEV/Nautilus-X concept preliminary to asteroid exploration in preparation. The duration of a slow interstellar journey presents a major obstacle.
The following are some proposed solutions:
The Enzmann starship, as detailed by G. Harry Stine in the October 1973 issue of Analog, was a design for a future starship, based on the ideas of Dr. Robert Duncan-Enzmann. The spacecraft itself as proposed used a 12,000,000 ton ball of frozen deuterium to power 12–24 thermonuclear pulse propulsion units. Twice as long as the Empire State Building and assembled in-orbit, the spacecraft was part of a larger project preceded by interstellar probes and telescopic observation of target star systems. 
A generation ship is a type of interstellar ark in which the crew which arrives at the destination is descended from those who started the journey. Generation ships are not currently feasible, because of the difficulty of constructing a ship of the enormous required scale, and the great biological and sociological problems that life aboard such a ship raises.
Scientists and writers have postulated various techniques for suspended animation. These include human hibernation and cryonic preservation. While neither is currently practical, they offer the possibility of sleeper ships in which the passengers lie inert for the long years of the voyage.
Extended human lifespan
A variant on this possibility is based on the development of substantial human life extension, such as the "Strategies for Engineered Negligible Senescence" proposed by Dr. Aubrey de Grey. If a ship crew had lifespans of some thousands of years, or had artificial bodies, they could traverse interstellar distances without the need to replace the crew in generations. The psychological effects of such an extended period of travel would potentially still pose a problem.
Embryo space colonization A robotic space mission carrying some number of frozen early stage human embryos is another theoretical possibility. This method of space colonization requires, among other things, the development of a method to replicate conditions in a uterus, the prior detection of a habitable terrestrial planet, and advances in the field of fully autonomous mobile robots and educational robots which would replace human parents.
Originally posted by yeti101
too far we wait until we find something closer.
Originally posted by Xeven
This goes to show you that our priorities are out of wack. We should be spending money on advanced propulsion and technologies to allow us to warp space rather than just fininding out there is cool stuff out there we can not hope to ever see, visit, sample, understand.