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> Helix planetary nebula (NGC 7293) in Aquarius
Helix planetary nebula (NGC 7293) in Aquarius
author: ESA/Nasa/NOAO/Novapix
reference: a-nep72-93001
Image Size 300 DPI: 135 * 135 cm
This composite image is a view of the colorful Helix Nebula taken with the Advanced Camera for Surveys aboard NASA's Hubble Space Telescope combined with the wide view of the Mosaic Camera on the National Science Foundation's 0.9-meter telescope at Kitt Peak National Observatory near Tucson, Ariz. The object is so large that both telescopes were needed to capture a complete view. The Helix is a planetary nebula, the glowing gaseous envelope expelled by a dying, sun-like star. The Helix resembles a simple doughnut as seen from Earth. New evidence suggests that the Helix consists of two gaseous disks nearly perpendicular to each other. One possible scenario for the Helix's complex structure is that the dying star has a companion star. One disk may be perpendicular to the dying star's spin axis, while the other may lie in the orbital plane of the two stars. The Helix, located 690 light-years away, is one of the closest planetary nebulas to Earth. The Hubble images were taken on November 19, 2002; the Kitt Peak image on Nov 3 2001.
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