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
Saturn's moon, Mimas, not only looks like the Death Star, it also has a Pac Man heat signature.
15
There are 5 to 10 times more stars in the known Universe than there are grains of sand on all the world's beaches, but a single grain of sand has more atoms than there are stars in the known Universe.
20
There are more nerve cells in the human brain than there are stars in the Milky Way.
349
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
One pinhead of the sun's energy is enough to kill a person at a distance of 160 kilometers.
277
In 1859, the largest known geomagnetic storm struck the Caribbean, causing an aurora and telegraphs could even operate without a power source.
25