An oddly tilted object beyond Neptune moves in perfect sync, one orbit for every ten of Neptune’s, and scientists are intrigued.

NASA’s twin Voyager spacecraft, Voyager 1 and Voyager 2, embarked on a historic journey to explore the outer planets of our solar system. Taking advantage of a rare planetary alignment, the probes ...

The solar system consists of eight planets, several dwarf planets, hundreds of moons, and billions of asteroids, comets and meteoroids. The exact boundaries of the solar system ar ...

I f 2025 hasn’t been chaotic enough, Mercury retrograde is back (right on the heels of the Buck Moon) to shake things up even ...

On its record-breaking pass by the Sun late last year, the Johns Hopkins APL-built Parker Solar Probe captured stunning ...

Jupiter, Saturn, and Neptune each emit more energy than they receive from the Sun, meaning they have comparatively warm ...

Astronomers discover Ammonite, a rare icy object beyond Pluto, challenging Planet Nine theory and offering clues to the solar ...

Researchers use the Subaru Telescope in Hawaii to find a small object on the outer edge of the Solar System. Nicknamed ...

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 ...

WASP-121b, an already unusual planet, might have a remote origin that explains some of its peculiar properties—from iron rain ...