Imagine a star more massive than the sun yet hardly larger than a small city. (sciencemag.org)
After around 100,000 years, it has built up so much hydrogen it produces a massive burst, making the star about 300,000 times brighter than our sun for a short period of time. (newsweek.com)
A lightning bolt is four times hotter than the sun's surface, yet we don't know what triggers it. (newscientist.com)