Scientists have recently discovered repeating radio signals coming from a mysterious source well beyond the Milky Way. While one-off fast radio bursts (FRBs) have been detected in the past, this is the first time multiple signals have been detected coming from the same place in space.
In 2008 there was a gamma ray burst, a violent cosmic explosion, 7.5 billion light years away, which is halfway across the visible universe, which could have been seen with a naked eye from the surface of the Earth. Anyone who saw it was looking billions of years into the past with their eyes.
The Andromeda galaxy is heading towards us at 250,000 miles per hour. We are expected to collide with it in 4 billion years.
Astronomers had made a sweet discovery: simple sugar molecules floating in the gas around a star some 400 light-years away, suggesting the possibility of life on other planets.
If the Sun was scaled down to the size of a white blood cell, the Milky way would be the size of the continental United States.
If you were were exposed to outer space without a suit, after about 15 seconds, you would be blue, bloated, and in an unresponsive stupor, but not dead. If they got you back inside and gave you oxygen within about 90 seconds, you’d likely make a complete recovery with only minor injuries.