Learn about the solar system in our new What If song. Explore planets, moons, and cosmic wonders through music and imagination.

Comet 3I/ATLAS, the third confirmed interstellar object to enter our solar system, is now racing into the cosmic dark on a hyperbolic trajectory that ensures it will never return. First detected in ...

Having made its closest approach to the sun on Wednesday October 29, comet 3I/ATLAS will soon be visible from Earth ...

Astronomers have reportedly discovered a skyscraper-sized asteroid moving through our solar system at a near record-breaking pace. The asteroid, named 2025 SC79, circles the sun once every 128 days, ...

A scientist spotted the asteroid hiding in the light of the sun. It's not an imminent threat to Earth, but other space rocks like it could be. A newly found space rock almost broke a speed record. The ...

Is solar power going to take over the world? The past few years have seen a frankly astounding acceleration in the rate of its deployment, with total generation capacity doubling between 2022 and 2024 ...

Analyses of its emissions using NASA’s Neil Gehrels Swift Observatory indicate that the interstellar comet probably has a very different structure than comets in the solar system. Hydroxyl compounds ...

What a coincidence! The mysterious interstellar object known as 3I/ATLAS has been streaking through the Solar System at exactly the same moment as the U.S. government has shut down. This means that ...

A mysterious interstellar comet — just the third such object ever confirmed to have entered our solar system — streaked past Mars last week. A spacecraft in orbit around the red planet had a front-row ...

Yeimy J. Rivera receives funding from NASA's Parker Solar Probe project through the SAO/SWEAP subcontract 975569. Tatiana Niembro receives funding from NASA's Parker Solar Probe project through the ...

Voyager 1, launched in 1977, has traveled farther than any spacecraft in human history. After more than four decades of silent endurance through space, it now sails beyond the orbit of the outer ...

It's probably a comet, but it might be some sort of ancient alien spacecraft or probe. What's for sure is that the mystery surrounding an object known as 3I/ATLAS is becoming both more and ...