The summer solstice marks the moment when the Sun reaches its highest point in the sky, leading to the longest day of the ...

As the universe expands, it feels like it must be spreading out from some initial point. But a physicist explains why that’s ...

Upgrades to the National Science Foundation's Daniel K. Inouye Solar Telescope have delivered stunning new images of the ...

The summer solstice, the longest day of the year in the Northern Hemisphere, falls on June 20 this year in North America.