Which way is ‘down’ has a different answer depending on where you are on Earth, in the solar system, in our galaxy and beyond ...

What was originally thought to be a planet orbiting the Fomalhaut star was probably just the fallout of a wild collision.

Long before humans walked the Earth, your solar system had a brush with two blazing blue stars that passed surprisingly close ...

New images from NASA 's Hubble Space Telescope have revealed an enormous, oddly shaped disk of gas and dust around a single ...

At the farthest edge of the Sun’s influence, the Voyager probes have stumbled into something that sounds almost mythic: a ...

Click to share on Facebook (Opens in new window) Facebook Click to share on X (Opens in new window) X But as seen from Earth, conditions for viewing Venus and Mars are now very poor, because those ...

Astronomers have identified a distant, slow-moving object in historical sky surveys that may represent a previously unknown ninth planet orbiting far beyond Neptune. The object, observed at an extreme ...

Astronomers are once again questioning whether our solar system is complete. Subtle gravitational effects suggest something large may be hiding far beyond the known planets. It hasn’t been directly ...

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3I/ATLAS has now made its closest approach to the sun and Earth and is now heading back out toward the outer solar system. When you purchase through links on our site, we may earn an affiliate ...

Many icy moons in the outer solar system are believed to harbor vast subsurface oceans sandwiched between thick ice shells and rocky cores. Since 2008, the methane-shrouded moon Titan has been thought ...