Stretching billions of miles beyond Neptune, the Kuiper Belt is a vast ring of icy worlds — a frozen frontier where ancient ...

Scientists have recently unveiled a remarkable discovery in the outer reaches of our solar system: a space fossil located 4 ...

It will be a while before you can see it for yourself, however. Halley’s comet was last visible from Earth in 1986, meaning ...

Comet C/2025 A6 (Lemmon) is this year’s brightest comet visible from Earth—an icy relic from the solar system’s origins that ...

Bill McKinnon shares his story of a career spent studying the geology and geophysics of icy worlds beyond our own. McKinnon, ...

The simulation of the Solar System that came the closest to the observation was the presence of a small planet, between the ...

Astronomers are investigating a potential hidden planet, dubbed Planet Y, far beyond Neptune. Its gravitational pull is ...

Astronomers believe they may have uncovered evidence of a hidden Earth -size planet lurking in the outer solar system. Dubbed ...

The solar system is composed of the sun, eight major planets, five dwarf planets, over a hundred moons, and countless comets ...

A recent study by Princeton University astronomers suggests the possible existence of a previously undetected planet in our ...

Since Pluto was relegated to dwarf planet status, almost everyone has agreed that there are eight planets in our solar system ...

SpaceX’s Falcon 9 rocket left Cape Canaveral Space Force Station’s Space Launch Complex 40 at 9:58 p.m. ET on Monday. The ...