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

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

NASA is planning a mission to the coldest known object in our solar system in its hunt for alien life. The legendary space agency wants to send a high tech probe to Neptune's icy moon Triton, which ...

Neptune is the keeper of the deep: The last known major planet from the Sun, the god of the boundless sea beyond the inner solar system that marks the shore of the black depths of interstellar space.

NASA/ESA Hubble Space Telescope, Gemini North telescope and NASA Infrared Telescope Facility observations of Neptune and ...

WASHINGTON — Frigid and far-flung Neptune, our solar system’s outermost planet, is adding to its reputation as an enigmatic world, with astronomers puzzled by a surprising drop in its atmospheric ...

(CNN) -- 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 ...

Recent observations of the Kuiper Belt have revealed anomalies that suggest the presence of an undiscovered Neptune-sized ...

In the vast and boundless universe, countless astonishing mysteries are hidden. Today, let us turn our gaze to the mysterious ...

You probably already know that gravity can greatly influence cosmic objects as they make their way through space. We see this constantly in how the Sun's gravity causes planets to orbit it. And even ...

Say hello to Hippocamp, a celestial pipsqueak that's making big waves at the edge of our solar system. With help from NASA's Hubble Space Telescope, astronomers have confirmed the existence of this ...

When Voyager II flew past Neptune in August of 1989 it revealed a complex system of 13 moons, six of which had never been seen before. Thirty years later, scientists say the space probe missed one.