At half the size of Earth and one-tenth its mass, Mars is a featherweight as far as planets go. Yet new research reveals the ...

Pluto sits far out in the Solar System, small and dim, moving at a pace that barely fits human timelines. It was found in ...

Here's how the astronomical phenomenon influences our planet—from the length of our seasons to the way Earth moves through ...

Astronomers have directly observed a free-floating planet, comparable in mass to Earth, roaming the Milky Way. Discovered via ...

Thanks to the discovery of thousands of exoplanets to date, we know that planets bigger than Earth but smaller than Neptune ...

Why don't planets fall into the stars they orbit if they're constantly being pulled by gravity?Lindsey CoughterRocky Mount, ...

A solar conjunction occurs as Venus' orbit carries it into alignment with the sun and Earth. Venus will align with the sun ...

Earth reaches its closest point to the sun in its 2026 orbit on Jan. 3. The sun will appear larger in the sky than on any ...

You're not imaging it. The sun has been rising later in Illinois following the winter solstice. But the days aren't getting ...

New research tracks young planets around a nearby star, showing how large, gas-rich worlds shrink over time to become the most common planets in the galaxy ...

The New Year would begin with our planet being closest to the sun, raising queries about the cold weather and no heat despite the proximity.