Pluto
Because it is so far from the Sun, astronomers had a hard time measuring Pluto’s size. They finally got it […]
Comets
For astronomers, though, a comet’s beauty is not just in its appearance, but in its content: A comet is an
Asteroids
But the next year, astronomers found a second object in a similar orbit, then another, and another. Instead of a
Meteorites
Physicist Jean-Baptiste Biot investigated the L’Aigle events. He found that people in other villages had seen a bright fireball in
Explorations of Minor Bodies
Galileo is best known for its reconnaissance of Jupiter. As it transited the asteroid belt en route to Jupiter, though,