Re:First habitable exoplanet discovered?
by btilly on Tuesday May 17, 2011 @01:18AM
(#2555367)
According to the traveler you're traveling as fast as you think the traveler is traveling. The only way to make that work out is that to the traveler the destination is much closer than it is for you. This is called length contraction.
And rounding it out, different observers disagree on which events are simultaneous. In particular until the traveler turns around, the traveler thinks that the Earth was left recently. After the traveler turns around, in the new reference frame the traveler left the Earth close to 40 years prior.
And rounding it out, different observers disagree on which events are simultaneous. In particular until the traveler turns around, the traveler thinks that the Earth was left recently. After the traveler turns around, in the new reference frame the traveler left the Earth close to 40 years prior.