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News Release Archive:

News Release 12 of 1057

October 6, 2016 01:00 PM (EDT)

News Release Number: STScI-2016-34

Hubble Detects Giant 'Cannonballs' Shooting from Star

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Image: Artist's Illustration of Scenario for Plasma Ejections from V Hydrae

Artist's Illustration of Scenario for Plasma Ejections from V Hydrae Artist's Concept

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ABOUT THIS IMAGE:

This four-panel graphic illustrates how the binary-star system V Hydrae is launching balls of plasma into space.

Panel 1 shows the two stars orbiting each other. One of the stars is nearing the end of its life and has swelled in size, becoming a red giant.

In panel 2, the smaller star's orbit carries the star into the red giant's expanded atmosphere. As the star moves through the atmosphere, it gobbles up material from the red giant, which settles into a disk around the star.

The buildup of material reaches a tipping point and is eventually ejected as blobs of hot plasma along the star's spin axis, shown in panel 3.

This ejection process is repeated every eight years, the time it takes for the orbiting star to make another pass through the bloated red giant's envelope, shown in panel 4.

 

Image Type: Illustration/Artwork/Annotated

Credit: NASA, ESA, and A. Feild (STScI)