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Eye in the Hourglass Nebula - MyCn 18. Maximum Print Size: 13" x 17" Photographer/Artist: NASA Public Domain Image Number: 0124-1009-0712-3807 License This Image Poster Art-Print Description: Eye in the Hourglass Nebula - MyCn 18 stock photo. This is a photo by NASA Public Domain showing eye in the Hourglass Nebula - MyCn 18. The sands of time are running out for the central star of this the Hourglass Nebula. With its nuclear fuel exhausted, this brief, spectacular, closing phase of a sun-like star's life occurs as its outer layers are ejected and its core becomes a cooling, fading white dwarf. In 1995, astronomers used the Hubble Space Telescope to make a series of images of planetary nebulae, including the one above. Here, delicate rings of colorful glowing gas (nitrogen-red, hydrogen-green, and oxygen-blue) outline the tenuous walls of the 'hourglass.' The unprecedented sharpness of Hubble's images revealed surprising details of the nebula ejection process and may resolve the outstanding mystery of the variety of complex shapes and symmetries of planetary nebulae. Image Credit: NASA, WFPC2, HST, R. Sahai and J. Trauger (JPL) Image courtesy of NASA. NASA images are in the public domain and may be used for free, however certain restrictions may apply. This public domain image may not be used in any way suggesting approval or endorsement of any people appearing in the photos. Please read the NASA guidelines for use for more information and info about using the NASA insignia logo and other intellectual property that may appear in these NASA public domain images. Stock photography by NASA Public Domain associated terms: poster, posters, art print, art prints, posters and art prints, being watched, eye, eye in the hourglass nebula, eye in the hourglass nebula mycn 18, eye watching, eyeball, free public domain, hourglass, hourglass nebula, hst, hubble space telescope, mycn 18, mycn18, nasa, nasa images, nasa public domain, nasa public domain photo, nasa public domain photos, national aeronautics and space administration, nebula, planetary nebula, public domain, space objects, the hourglass nebula, us government, watching, watching eye, astronomy,

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