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Scientists Know Where Aliens Might Be, But Humans Will Never See Them

Time really knows how to mess up the potential alien party for us.

via MOTHERBOARD

As the name implies, the observable universe is everything that humans can see from Earth with our increasingly sophisticated observatories. As our astronomical vision has improved over the centuries, we’ve discovered that gazing into space is also a form of time travel to the past. If you look at a star like Sirius, which is eight light years away, you are seeing an image of it eight years ago, when the starlight hitting your eye left it. The farther away an object in space is, the more distant in time it is as well, and so the light from stars that died long before our planet was born continues to reach Earth.

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