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News Release Archive:

News Release 630 of 959

August 24, 1999 09:00 AM (EDT)

News Release Number: STScI-1999-32

Symbiotic Star Blows Bubbles into Space

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Image: Symbiotic Star Blows Bubbles into Space

Symbiotic Star Blows Bubbles into Space

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ABOUT THIS IMAGE:

Panel 1: A pulsating red giant star and a compact, hot white dwarf star orbit each other.

Panel 2: The red giant sheds much of its outer layers in a stellar wind. The white dwarf helps concentrate the wind along a thin equatorial plane. The white dwarf accretes some of this escaping gas forming a disk around the itself.

Panel 3: When enough gas accumulates on the white dwarf's surface it explodes as a nova outburst. Most of the hot gas forms a pair of expanding bubbles above and below the equatorial disk.

Panel 4: A few thousand years after the bubbles expand into space, the white dwarf goes through another nova outburst and makes another pair of bubbles, which form a distinctive hourglass shape.

Image Type: Illustration

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