Every year in early January, Earth reaches the closest point in its orbit to the Sun, a moment astronomers call perihelion. We are slightly nearer to our star and receiving more solar energy than we ...

The sun seems to be taking an unexpected nap right now — just in time for the April 8 total solar eclipse on Monday. Until recently, solar activity has been very high, which has raised hopes that we ...

The sun can't make up its mind. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. The sun offers plenty of brainteasers: Right now, for instance, ...