Nearly 4.5 million years ago, two large, hot stars brushed tantalizingly close to Earth's sun. They left behind a trace in ...

Learn more about two of the earliest reports of a total solar eclipse and corona, which were recorded in China, and solve several mysteries about our ancient Solar System.

What effect would it have on our Solar System?

For decades, astronomers have detected an unusual mix of ionised gas in the local clouds. Roughly 20% of hydrogen and 40% of ...

After decades of searching, astronomers may have finally stumbled upon the first moon known to exist beyond our solar ...

Mercury is the innermost and smallest of the eight major planets in our Solar System, orbiting closest to the Sun. Though ...

Far beyond Neptune, at the far outer rim of our Solar System, astronomers have spotted what looks like a hidden “structure” ...

When a meteor flashes across the night sky, it’s more than a beautiful streak of light. It’s a delivery from deep space—an ...

Previous claims of exomoon discoveries haven’t stood up well to replication, but perhaps a new method will have more success.

The comet 3I/ATLAS is taking a long holiday journey this year. It’s visiting from another solar system altogether. Those ...

The puzzling electric charge on clouds of interstellar gas can be explained by the passage of two hot, bright stars close to ...