Far beyond the bright planets, in the dim outskirts of the Solar System, astronomers keep stumbling on objects that refuse to ...

Beyond Neptune, a celestial object puzzles astronomers with its synchronized motion with the giant planet. Its inclined orbit challenges current models of the outer Solar System. Discovered by an ...

Washington, DC – Three new objects locked into roughly the same orbit as Neptune–called “Trojan” asteroids–have been found by researchers from the Carnegie Institution’s Department of Terrestrial ...

Pluto - the solar system's loneliest dwarf planet - is getting a friend... eventually. It's the New Horizons probe from NASA and it just passed Neptune's orbit. Pluto - the solar system's loneliest ...

[Related: Neptune’s faint rings glimmer in new James Webb Space Telescope image.] “The three newly discovered moons are the faintest ever found around these two ice giant planets using ground-based ...

Astronomers studying the distant reaches of our Solar System have identified an unusual trans-Neptunian object (TNO) locked in a rare orbital configuration with Neptune. The object, discovered through ...

The existence of "Planet Nine," a hypothetical planet in the outer solar system, is supported by indirect evidence such as the unusual clustering of orbits of extreme trans-Neptunian objects (ETNOs) ...

Astronomers used a telescope in Hawaii to find a new object on the outer edges of our solar system, helping to fuel evidence of a long-standing theory about Planet Nine, or Planet X. For years, ...

Earth has a newly-discovered neighbor in the solar system. But the heavenly body – possibly a dwarf planet à la Pluto – isn't a frequent visitor. Located beyond Neptune, its extreme orbit ...

New images released Wednesday from NASA's James Webb Space Telescope are revealing Neptune, and the planet's hard-to-detect rings, in a fresh light. "It has been three decades since we last saw these ...

Triton was discovered in 1846 by the British astronomer William Lassell, but much about Neptune’s largest moon still remains a mystery. A flyby by NASA's Voyager 2 spacecraft in 1989 offered a quick ...

Breakthroughs, discoveries, and DIY tips sent every weekday. Terms of Service and Privacy Policy. Astronomers are adding three newly discovered moons to our solar ...