Pluto was once known as the ninth planet but was reclassified after scientists set clear criteria for planets. The key factor was Pluto’s inability to clear its orbital path, leading to its current ...

For reference, Pluto’s average distance from the Sun is about 40 AU, so 2023 KQ14 is quite distant. At 23.4 billion miles (37 ...

Because Pluto is so dim, you need a telescope to see it. “A backyard telescope could do it under the right conditions,” says ...

NASA's New Horizons spacecraft made history by flying past Pluto, sending back groundbreaking data that would change our ...