Fast-moving stars seen in a nearby star cluster within the Milky Way suggest the presence of an elusive black hole which may be the closest one to Earth, researchers say. The star cluster, Omega Centauri, is a collection of around 10 million stars, visible as a smudge in the nightContinue Reading

NASA has discovered “surprise” X and C shapes in the Earth’s atmosphere – and scientists are struggling to explain them. While these alphabetical shapes have been observed before, Nasa’s Global-scale Observations of the Limb and Disk mission sees them more clearly than other instruments have and is now finding themContinue Reading