Solar Flares

A solar flare is a sudden flash of increased brightness on the Sun, usually observed near its surface and in close proximity to a sunspot group. Powerful flares are often, but not always, accompanied by a coronal mass ejection. Even the most powerful flares are barely detectable in the total solar irradiance (the "solar constant"

Source: Wickipedia https://en.wikipedia.org/wiki/Solar_flare

See also "Shedding new light on solar flares: here: https://www.techexplorist.com/shedding-new-light-solar-flares/33217/

See this one too: https://earthsky.org/space/star-explosion-birth-fireworks-omc-1-orion