Our Sun’s outer atmosphere, the corona, is millions of degrees hotter than it should be, and no one knows why.

This logic puzzle looks simple at first, but quickly becomes challenging. Solving it requires a solid understanding of how ...

The workings of our solar system are roughly the same now as they have been for millions of years. Moons circle their planets, the planets circle the sun, the sun’s magnetic fields and sunspots wax ...

In humanity’s millennia of staring at the stars and decades of launching probes to explore our universe, only two spacecraft carrying working instruments have ever managed to escape the bubble of ...

Illustration comparing the planets of the Solar System and the Sun on the same scale. The planets are shown to scale relative to each other but their distances are not. From left to right the bodies ...