Is there a massive undiscovered planet on the outer reaches of the solar system? The idea has been around since before the ...

The newly discovered world — a "sednoid" — challenges what planetary scientists thought they knew about the edge of the solar ...

A rare celestial object beyond Neptune, 2020 VN40, moves in sync with Neptune, offering new insights into the outer solar system and fueling the search for Planet Nin ...

NASA's Solar Dynamics Observatory captured a rare solar eclipse on July 25, 2025, during which 62% of the sun was blocked by ...

The newly released images from a December flyby are so detailed that scientists can see explosions and the flow of solar winds.

Pluto reaches opposition and is ready for those who want to chase it down. Use the biggest scope you've got, or take aim with ...

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

Typically, telescopes are synonymous with bringing far-off objects close, but the newest member of the solar system was ...

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

Newly released imagery from NASA shows the Sun's corona in stunning detail after the Parker Solar probe performed its closest-ever flyby.

Over the past decade, researchers have been puzzling through Pluto’s mysteries. Meanwhile, the New Horizons probe heads for interstellar space.

How many dwarf planets are there in our solar system? The recent discovery of 2017 OF201 makes the tally anywhere between ...