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

The Solar System is passing through an interstellar cloud. Antarctic ice reveals material accumulated from long-dead stars.

The outer planets of the solar system are swarmed by ice-wrapped moons. Some of these, such as Saturn's moon Enceladus, are known to have oceans of liquid water between the ice shell and the rocky ...

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. In the local parts ...

Learn how traces of a rare radioactive element preserved in Antarctic ice may show that the Solar System is currently passing ...