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News Release Archive:

News Release 614 of 948

October 7, 1999 12:00 PM (EDT)

News Release Number: STScI-1999-35

Hubble Heritage Project's First Anniversary

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Image: NGC 2440

NGC 2440STScI-PRC1999-38

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NGC 2440 is another planetary nebula ejected by a dying star, but it has a much more chaotic structure than NGC 2346. The central star of NGC 2440 is one of the hottest known, with a surface temperature near 200,000 degrees Celsius. The complex structure of the surrounding nebula suggests to some astronomers that there have been periodic oppositely directed outflows from the central star, somewhat similar to that in NGC 2346, but in the case of NGC 2440 these outflows have been episodic, and in different directions during each episode. The nebula is also rich in clouds of dust, some of which form long, dark streaks pointing away from the central star. In addition to the bright nebula, which glows because of fluorescence due to ultraviolet radiation from the hot star, NGC 2440 is surrounded by a much larger cloud of cooler gas which is invisible in ordinary light but can be detected with infrared telescopes. NGC 2440 lies about 4,000 light-years from Earth in the direction of the constellation Puppis.

The Hubble Heritage team made this image from observations of NGC 2440 acquired by Howard Bond (STScI) and Robin Ciardullo (Penn State).

Object Name: NGC 2440

Image Type: Astronomical

Image Credit: NASA and The Hubble Heritage Team (AURA/STScI).

NEWS RELEASE IMAGES

The above image is part of a montage:

Montage Image: Hubble Heritage Project's First Anniversary Image Type: Astronomical Hubble Heritage Project's First Anniversary Herbig Haro 32: Jets of Material Ejected From a Young Star Image Type: Astronomical Herbig Haro 32: Jets of Material Ejected From  a Young StarPRC1999-35 Hubble's Variable Nebula (NGC 2261) Image Type: Astronomical Hubble's Variable Nebula (NGC 2261)PRC1999-36 NGC 2346 Image Type: Astronomical NGC 2346PRC1999-37

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