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NASA's Hubble Space Telescope (HST) has given astronomers their earliest look at a rapidly ballooning bubble of gas blasted off a star. The shell surrounds Nova Cygni 1992, which erupted February 19, 1992. A nova is a thermonuclear explosion that occurs on the surface of a white dwarf star in a double star system. Nova Cygni 1992 was one of the brightest novae in 20 years, reaching naked-eye visibility for a brief period.

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      Details
      Last Updated Aug 29, 2025 Editor Andrea Gianopoulos Location NASA Goddard Space Flight Center Related Terms
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      Details
      Last Updated Aug 21, 2025 Editor Andrea Gianopoulos Location NASA Goddard Space Flight Center Related Terms
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      Text Credit: ESA/Hubble
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      Last Updated Aug 14, 2025 Editor Andrea Gianopoulos Location NASA Goddard Space Flight Center Related Terms
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