Since one light year is the equivalent nearly six trillion miles, it would take 22 million years to travel 600 light years on a space shuttle and visit Kepler 22-b with our current technology.
The following diagram from NASA indicates just how far our closest near-“solar twin” really is:
But while we won’t be able to visit this Kepler-22b, scientists say another planet like it and closer to it could be discovered in this lifetime. The Kepler telescope has already detected hundreds of new planets.more information...
Source: http://www.washingtonpost.com
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