Hubble Finds Surprises Around a Star That Erupted 40 Years Ago
4 min read Hubble Finds Surprises Around a Star That Erupted 40 Years Ago This artist’s concept shows the nova system HM Sagittae (HM Sge), where a white dwarf star is pulling material from its red giant companion. This forms a blazing hot disk around the dwarf, which can unpredictably undergo a spontaneous thermonuclear [...]