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....
Henrietta Leavitt spent her career at Harvard doing work considered too tedious for the men around her, poring over photographic plates by hand, cataloging...
A planet is a world that orbits the Sun, is round, and has swept its own path through space mostly clear of other objects. Tick all three of those boxes and you're a planet. Miss even one, as Pluto famously does, and you're something...
Fall evenings have a certain magic to them, the air gets crisp, the sky gets darker earlier, and if you look up toward the northeast after sunset, you'll find one of the most rewarding constellations for anyone getting into stargazing. The constellation Andromeda stars...
Look up on a dark night and every star seems like the same little white dot. They're not. Stars come in a whole range of types, and astronomers mostly sort them two ways: by color, which really means temperature, and by size and life...