Fluctuating levels of radioactive iron-60 suggest the solar system recently entered a cosmic cloud.

When you think of outer space, you're likely picturing stars, planets and moons. But much of space is filled with clouds of gas, plasma and stardust—known as interstellar clouds.

Stephen has degrees in science (Physics major) and arts (English Literature and the History and Philosophy of Science), as well as a Graduate Diploma in Science Communication. Stephen has degrees in ...

Infrared sensors on the ground detected the heat signature of the OSIRIS-REx spacecraft’s sample-return capsule when it slammed into the atmosphere at more than 45,000 km/h (27,650 mph), at 8:42 a.m.

Every once in a while, the outer solar system reminds us that we've only discovered a negligible portion of it, and that the vast majority is still full of surprises. The latest example of this is a ...

Long before humans walked the Earth, your solar system had a brush with two blazing blue stars that passed surprisingly close by. Nearly 4.4 million years ago, they swept past at a distance of only ...

"The signatures of space weathering we have detected directly will give us a better understanding of some of the phenomena occurring in the solar system." When you purchase through links on our site, ...

The rusty world is full of mysteries—and some of the solar system's most extreme geology. Learn more about Earth's smaller, colder neighbor.