Astronomers have found 2023 KQ14, nicknamed Ammonite, a rare sednoid with a unique orbit that challenges the Planet Nine hypothesis.

Predictions of the LSST Solar System Yield: Near-Earth Objects, Main Belt Asteroids, Jupiter Trojans, and Trans-Neptunian Objects. The Astronomical Journal (submitted to arXiv) , 2025 DOI: 10.3847 ...

In fact, it is the most distant object in the solar system. Oct 02, 2018 12:45 PM EDT. ABOUT THE AUTHOR. Nicole Mortillaro. Senior Science Reporter.

Primitive ices and gas from the earliest days of the solar system can remain trapped inside deep-space objects like comets and Kuiper Belt Objects (KBOs) for billions of years. That’s the ...

Interstellar Particles Hiding In Our Solar System. Unlike large, fast-moving objects like ‘Oumuamua, interstellar dust and debris from Alpha Centauri could be much harder to detect.The study ...

M ore than 1 million "interstellar objects" the size of the Statue of Liberty could be drifting unseen in the outer solar system right now, new simulations suggest. The hefty cosmic interlopers ...

Just the third-ever confirmed interstellar object has been detected in our solar system. Here's what we know. (Spoiler: It's not aliens.) The interstellar comet, originally called A11pl3Z and now ...

A mysterious visitor from another solar system could be an alien spacecraft, according to a leading Harvard astronomer.. The enormous interstellar object, now officially dubbed 3I/ATLAS, is ...

The solar system remains a dynamic and mysterious place. Every new object like 2017 OF201 adds a piece to the puzzle. Whether or not we ever actually solve the mystery of Planet Nine , though ...

The Colorado Scale Model Solar System depicts the Sun, the planets, and the distances between them all on the same scale of 1 to 10 billion. That is, the real objects and distances are 10 billion ...

37,000 trans-Neptunian objects, residents of the distant Kuiper Belt — nearly 10 times the current census — shedding light on Neptune’s past migration and the outer solar system’s history.