HD 20794 d completes its orbit just shy of two Earth years, placing it well within reach of conditions that might harbor life ...

Beyond Neptune lies the Kuiper Belt, a vast expanse of icy bodies that may hold clues to the solar system’s formation. These ...

The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

Staring up at the night sky, you might see thousands of stars sprinkled above the horizon. It feels as though you can see so ...

An object eight times the mass of Jupiter may have swooped around the sun, coming superclose to Mars' present-day orbit ...

Astronomers have discovered extremely powerful winds pummeling the equator of WASP-127b, a giant exoplanet. Reaching speeds ...

The formation of our solar system from a singular nebula raises an intriguing question: why did each planet develop with a ...

The enormous visitor to our solar system may have been about 8 times the mass of Jupiter, and come nearly as close to the sun ...

Our Solar System is a carefully balanced celestial dance held together by a virtually perfect balance of gravity and inertia.

WASP-121b is like nothing in the solar system, raining liquid metal and being puffy like a marshmallow. The origins of these ...

While the composition of gas and dust in a molecular cloud is fairly uniform, everything changes once a star begins to form.

Astronomers have discovered extremely powerful winds pummeling the equator of WASP-127b, a giant exoplanet. Reaching speeds up to 33,000 km/h, the winds make up the fastest jet-stream of its kind ever ...