Astrophysicists are mapping a vast, hidden structure in space that appears to guide matter and radiation along a kind of interstellar highway stretching from our solar neighborhood to distant stars.

Nearly 4.5 million years ago, two enormous, blazing stars swung close to the solar system. They did not touch the sun, but they came close enough to leave a permanent mark on the thin mist of gas that ...

Scientists have unearthed an "interstellar tunnel" linking our Solar System to far-off stars, suggesting it could be part of a vast network of cosmic tunnels akin to a gigantic subway system. The ...

In the early 1990s, the Hubble Space Telescope picked up something odd in the local clouds that surround our solar system. An unusually large number of electrons had been ripped apart from the atoms ...

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.

Measurements of this interstellar comet’s molecular makeup show an excess of heavy water molecules that is dramatically different from anything known to have ever formed around our sun ...

Scientists studying ancient Antarctic ice have discovered new evidence that Earth is currently traveling through a cloud of ...

Using a new technique that partly relies on artificial intelligence, researchers spotted potentially more than 10,000 new ...