The Sun

The sun's corona is 200 times hotter than its surface, defying models of stellar bodies. Now, this 80-year-old puzzle may finally have a solution.

Instruments in different parts of the solar system all captured radiation from the same coronal mass ejection for the first time ever.

In back to back days, the sun appeared to melt into the horizon due to a trippy optical illusion called the "Omega sun."

Two coronal mass ejections have combined into an enormous cloud of magnetized plasma that is forecast to hit Earth on Tuesday and potentially trigger a weak geomagnetic storm.

A phenomenon called coronal rain produces hot plasma clumps that streak through the sun's atmosphere like meteors, new data reveals.

The number of sunspots in June was higher than any month during the current or previous solar cycles, suggesting the upcoming solar peak will be far more active than initially anticipated.

The enormous dark patch and its powerful eruption are both signs that the solar maximum is fast approaching — and could be more active than expected.

Aphelion marks the point in our planet's orbit of the sun when it's at its maximum distance from our star. So why is it so hot out?

Space weather has been known to cause power outages and disrupt satellite function. Is the internet safe?

The ethereal aurora-like light show could become a more common sight over the next few years as the sun's activity continues to ramp up.