BBC Sky at Night Magazine on MSN
NASA's Voyager 1 probe is about to reach a distance of 1 light-day from Earth. Here's why this cosmic milestone is so huge
Voyager 1 is about to reach a huge milestone ...
It takes a beam of light a single day to travel 16.1 billion miles, a distance known as a light-day. It'll take Voyager 1, the American spacecraft moving at 10.6 miles per second, more than 49 years ...
The universe is at it again; scientists have been baffled by a discovery that turns all the knowledge they have on planetary systems on its head. Scientists have discovered an alien solar system ...
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