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

An extraordinary new image of interstellar comet 3I/ATLAS has given scientists their clearest view yet of a rare visitor from ...

The cosmological principle predicts uniformity, and the CMB dipole reflects our 370 km/s motion that radio counts should match—but recent surveys challenge this expectation. Donald Trump suffers ...

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

On Saturday (Jan. 10), for example, we will see three satellites on one side of Jupiter (going outward from the planet: Ganymede, Io and Europa ), while the fourth ( Callisto) remains all by itself on ...

The Great Red Spot is a gigantic storm, twice the size of Earth, that has swirled for centuries. It’s just one of many on the ...

These seven solar technologies from CES 2026 reveal how automation, new materials, and recycling are reshaping the future.

Could the icy moons of our solar system hold life beyond our planet? Keith Cooper looks at how planetary scientists plan to find out ...

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 ...

Solar physicists say they have found a key source of intense gamma rays unleashed when Earth’s nearest star produces its most ...

Pre-discovery archives have only added to the confusion. It turns out 3I/ATLAS may have been active even further out, beyond ...

This means there's no longer a need to choose between comfort, efficiency, and sustainability — or brace for soaring bills ...