Hubble Finds that Betelgeuse’s Mysterious Dimming Is Due to a Traumatic Outburst

Hubble Space Telescope observations show that the unexpected dimming of supergiant star Betelgeuse was probably caused by an immense amount of hot plasma ejected into space. The plasma cooled, forming a dust cloud that blocked starlight coming from Betelgeuse’s surface.

Supergiant Atmosphere of Antares Revealed by Radio Telescopes

An international team of astronomers has created the most detailed map yet of the atmosphere of the red supergiant star Antares. The unprecedented sensitivity and resolution of both the Atacama Large Millimeter/submillimeter Array (ALMA) and the National Science Foundation’s Karl G. Jansky Very Large Array (VLA) revealed the size and temperature of Antares’ atmosphere from just above the star’s surface, throughout its chromosphere, and all the way out to the wind region.