Energetic eruptions leading to a peculiar hydrogen - rich explosion of a massive star. (sciencenews.org)
The team used the Faint Object Camera and Spectrograph (FOCAS) mounted on the Subaru Telescope to thoroughly study the visible wavelength spectrum (Note 1) of the afterglow of a gamma - ray burst (GRB, Note 2), which is a violent explosion of a massive star. (sciencedaily.com)
Supernovae (singular: supernova) are the rare and extremely powerful explosions of massive stars late in their evolutionary histories. (kavlifoundation.org)