A neutron star (what remains after a Super Nova) is so dense that a portion of it the size of a sugar cube would weigh as much as all of humanity, or more than all the cars in the United States.
5
It takes a photon 170,000 years to travel from the core of the Sun to the surface, but only 8 minutes to travel the rest of the way to Earth.
6
Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
46
The light hitting the earth right now is 30 thousand years old.
163
Jupiter's magnetosphere is the largest single structure inside the Solar System. If you could see it with your eyes, it would appear larger than our full Moon.
8
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
When a massive power outage struck southern California in the 1990s, Los Angeles residents reportedly called 911 to express alarm about strange clouds hovering overhead; they were seeing the Milky Way for the first time.
31
If NASA sent birds into space they would soon die; they need gravity to swallow.
146