The newly identified cluster of Kuiper Belt objects lies about 4 billion miles from the Sun, offering fresh clues about how ...

Astronomers are closing in on one of the most tantalizing possibilities in planetary science, evidence that a previously ...

Astronomers at Princeton University have uncovered evidence that the outer solar system is more structured than long believed. Led by astrophysics doctoral student Amir Siraj, the research points to a ...

At the ragged frontier where the Sun’s influence gives way to the galaxy, a decades‑old spacecraft has stumbled into a ...

A lone body, making one passage around the Sun for every ten by Neptune, is rewriting the rules of planetary dynamics in the outermost reaches of our solar system. The discovery of 2020 VN40 a ...

A massive interstellar object passing through our solar system during its formative years likely altered the orbits of planets into trajectories observed today, a new study says. Interactions with ...

Once you remember that the sun also orbits the solar system's common center of mass, it all makes sense. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it ...

What would it take for Jupiter to ignite and become our second sun? What if Jupiter gained just a little bit more mass during ...

An object eight times the mass of Jupiter may have swooped around the sun, coming superclose to Mars' present-day orbit before shoving four of the solar system's planets onto a different course. When ...

A new study suggests that a close encounter with a massive interstellar object, possibly eight times the mass of Jupiter, may have significantly altered the orbits of the four outer planets in our ...