A constellation is a group of stars that forms a recognizable pattern in the night sky, one we've given a name, usually after a mythological figure, animal, or object. There are 88 of them officially recognized, and together they map out the entire sky....
Some constellations ask you to squint and use your imagination. Gemini practically introduces itself. Two bright stars sit side by side, almost the same brightness, like a pair of eyes looking back at you from the winter sky. Those are Castor and Pollux, the...
Here are the planets ranked by size, largest to smallest: Jupiter, Saturn, Uranus, Neptune, Earth, Venus, Mars, and Mercury. Jupiter is the undisputed giant and Mercury is the runt, and the gap between them is far bigger than most people ever picture.
What makes this...
Watch footage of the Apollo astronauts and something looks wrong before you even know why. They don't walk, they bounce, covering ten feet in a single lazy hop, floating just a little too long at the top of every stride. That's not a camera...