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The Difference Between Asteroids, Comets, and Dwarf Planets

Ceres was discovered in 1801 as the first asteroid. Pluto was discovered in 1930 as the ninth planet in the Solar System. But recently, it was reclassified as a “dwarf planet”. Let’s take a look at how the classification works for asteroids, comets, and dwarf planets: Asteroid – a mostly rocky object that is smaller […]

Objects in Space Beyond Neptune

Objects in Space Beyond Neptune

Pluto was once categorized as a planet, because we didn’t have a clear definition of what a planet is and because the objects we called planets were basically all the large objects we found orbiting the Sun. But then things changed. Around the year 2000, a team of astronomers headed by Mike Brown began discovering […]