The trans-Neptunian object Altjira, 44 times farther from the Sun than Earth is, could be the second known trinary, ...

Astronomers have long suspected that an enormous, unseen planet is hiding somewhere far beyond Neptune, quietly shaping the ...

Trans-Neptunian objects are the most distant solar system objects viewable from Earth. With some good equipment, a bit of luck, a bit of persistence and clear skies, you should be able to see some.

Almost 10 years ago, a NASA spacecraft was able to take several photos of Pluto, known for decades as a planet before it was ...

Astronomers at W. M. Keck Observatory on Maunakea have uncovered new insights about 2024 YR4. This is an Earth-crossing ...

If you buy through a BGR link, we may earn an affiliate commission, helping support our expert product labs. Astronomers spotted 139 new objects in our solar system in orbit beyond Neptune.

The Planet Nine theory was based on several trans-Neptunian objects, those that are beyond the eighth planet, with highly “tilted” orbits compared to the ecliptic plane. This seemed odd and ...

Given the typical orbit of an observatory about L2, the observational baseline of ~1.5 × 10⁶ km between L2 and Earth results in an instantaneous parallax of ~10″–100″, even for the most distant of ...

An artist’s rendition of a trans-Neptunian Object imagines the sun in the far, far distance. Some people in the aerospace business like engineering. Others prefer science. Jeralyn Gibbs ...

Work from the DiSCo program (Discovering the Composition of Trans-Neptunian Objects) has uncovered the existence of three main groups of trans-Neptunian objects (TNOs) in the outer Solar System.

Despite being a scenario widely pondered by astronomers and Hollywood writers for decades, further observations have since determined YR4 will not impact the Earth in 2032 as originally predicted.