The mysteries of ultradiffuse galaxies

An international team of astronomers have shed light on a mysterious galactic phenomenon: elusive ultradiffuse galaxies. Ultradiffuse galaxies (UDGs) are dwarf galaxies whose stars are spread out over a vast region, resulting in extremely low surface brightness, making them very difficult to detect. An international team of astronomers have used simulations to detect a few … Continue reading The mysteries of ultradiffuse galaxies

Missing: a large and unstable blue star

A massive and unstable star is missing from a dwarf galaxy, and astronomers are intrigued. It may just have become less bright and be partially obscured by dust, but that would mean it is eluding some pretty impressive technology. An alternative possible explanation is that it collapsed into a black hole without producing a supernova. … Continue reading Missing: a large and unstable blue star