If two pieces of metal touch in space, they become permanently stuck together.
808
The Sun and Moon appear to be the same size because the moon is 400 times smaller than the Sun, but 400 times closer to Earth.
13
The light hitting the earth right now is 30 thousand years old.
163
There are more nerve cells in the human brain than there are stars in the Milky Way.
349
Neil Armstrong, the first man to step foot on the moon, carried with him a piece of cloth and wood from the original 1903 Wright Flyer.
12
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