A star that exploded like a nuclear bomb is still raising questions half a century later

The consequences of a thermonuclear explosion in a binary star system about 3,400 light years away has been witnessed by Hubble Space Telescope. HM Sagittae, or HM Sge for short, is what is known as a symbiotic system, in which a white dwarf is eating with a friend red giant star The stolen material forms … Read more