NASA and The Hubble Heritage Team (STScI/AURA);
R. Sahai (Jet Propulsion Lab)
CLICK IMAGE FOR LARGER VERSION

Planetary nebulae have nothing to do with planets, but in crude or low-power telescopes they can look similar to the fuzzy disks that planets present. Large modern observatories, like the Hubble Space Telescope, can resolve these objects into dazzling detail.

The one, called NGC 3132, is typical of the breed: An expanding cloud of gas surrounds a dying star. NGC 3132 is about a half of a light-year in diameter and is visible from the Southern Hemisphere, where astronomers call it the Eight-Burst or the Southern Ring Nebula. At just 2,000 light-years away, this nebula is one of the closest known.

Look at the center. You'll see two stars. The fainter one is actually responsible for the beauty that surrounds it. Having ejected its shell, it's now smaller than our Sun but very hot. The intense ultraviolet radiation it emits lights up the nebula. The star that appears brighter in this image is younger, and the two stars are gravitationally bound in orbit around one another.

A third star is visible in the upper right corner of the image, but it is not part of the system.

-- Robert Roy Britt

Return each weekday for a new SPACE.com Image of the Day.

• Previous Image of the Day
• Image of the Day Archive
• Submit Your Photos
• Space Views: Image Galleries, Wallpaper & Zoom Images