Using NASA's Transiting Exoplanet Survey Satellite (TESS), astronomers have discovered two new exoplanets around a young ...

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 ...

Mathematicians calculated where the planet might be based on its effects on Uranus, and astronomers searched for less than an hour before they found the Neptune. That was in 1846.

Dwarf planet 2023 KQ14, Ammonite, has a stable orbit that challenges the hypothesis of the mysterious Planet Nine.

Pluto's unusual eccentricity and tilt is likely due to its interactions with neighboring Neptune and other giant planets, ...

A new program has discovered chaos in a nearby planetary system, which could explain the existence of a phenomenon ...

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) ...

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 ...

What is Neptune's Opposition? Understanding the Phenomenon of Opposition. Imagine when Neptune, Earth, and the ...

For decades following the discovery of Uranus in 1781, astronomers were puzzled by the irregularities in the planet's orbit.