Your immune system needs sunlight like plants need water. Without adequate exposure to natural light, your body's defense mechanisms weaken in ways most ...

Two spacecraft are currently directly observing the Sun: NASA's Parker Solar Probe (which will eventually approach to just 5% of the Earth-Sun distance), and ESA's Solar Orbiter, which is en route to ...

Readers’ letters on super investment priorities, Watt and Woodside, foreign policy, mental health claims and housing YIMBYs.

Imagine a star powered not by nuclear fusion, but by one of the universe’s greatest mysteries—dark matter. Scientists have ...

New supercomputer simulations suggest the Milky Way could be surrounded by dozens more faint, undetected satellite ...