In 2003, Palomar Observatory astronomers were in the midst of their search for planet-sized objects beyond Neptune when they ...

A newly discovered dwarf planet called 'Ammonite' (2023 KQ14) has been spotted in the outer solar system, and it could be another nail in the coffin for the Planet Nine hypothesis. When you purchase ...

Japanese astronomers have discovered a far-off object orbiting the Sun well beyond Neptune, suggesting that an extraordinary event occurred in the early solar system. The discovery was made by ...

Its scientific name is 2023 KQ14, and its discovery has raised a question mark on the existence of Planet Nine. An analysis of its orbit does not align with the calculations done on other cosmic ...

Astronomers in Japan have spotted a distant object orbiting the Sun far beyond Neptune, pointing to an extraordinary event that took place during the earliest years of the solar system. Astronomers ...

The Subaru Telescope has revealed a fourth member of the sednoids, a group of small bodies with peculiar orbits around the outer edge of the Solar System that includes Sedna. The new object, ...

The James Webb Space Telescope has captured an exoplanet no one had seen before. This marks a turning point in space exploration and opens up a path to finding small, cold worlds far beyond our Solar ...

How many dwarf planets are there in our solar system? The recent discovery of 2017 OF201 makes the tally anywhere between five and 18, plus hundreds of potentially undiscovered ones, depending on whom ...

A trio of scientists have published a paper that explains how they found a dwarf planet in a database. As explained in a pre-press paper [PDF] titled “Discovery of a dwarf planet candidate in an ...

If it’s actually out there, Planet 9 would take 10,000 years to orbit the Sun. (Credit: R. Hurt/California Institute of Technology) For years, astronomers have toyed with the idea that the Sun hides ...

For years, scientists have observed the Solar System’s outer reaches in search of a Planet Nine. While Pluto was demoted to dwarf planet status in 2006, some researchers believe an even larger world ...

This is a tricky one for the innermost planets. Humankind has known about them for thousands of years. Mercury, Venus, Mars, Jupiter and Saturn are all visible in the night sky with the unaided eye.