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Bright stars outline the familiar shape of the Christmas Tree Cluster in this visible-light image, which has been rotated 180°. Another famous structure, called the Cone Nebula, sits atop the tree. It's located in the constellation Monoceros. (Image: NOAO/AURA/NSF) Mona Evans "Monoceros the Unicorn"

Eyes and Nebulas.    ©Mona Evans, “Nebulae”
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Community Post: The Universe In Us

Eyes and Nebulas. ©Mona Evans, “Nebulae”

The Red Square Nebula (MWC 922) (Image Credit & Copyright: Peter Tuthill (Sydney U.) & James Lloyd (Cornell)) The hot star system MWC 922 seems to be embedded in a square nebula. No one knows how this came about. Infrared combined image from Mt. Palomar in California & the Keck-2 Telescope in Hawaii. Mona Evans, "Cosmic White Christmas"

Cassini color image of "snowy" landscape of Enceladus. This terrain lies north of the geologically active south polar ridges and features a rolling terrain crosscut by narrow fractures. (Credit: NASA/Processing by Paul Schenk (Lunar and Planetary Institute, Houston)) Mona Evans, "Cosmic White Christmas"

Rosette Nebula (NGC 2237). (Image: Adam Block & Tim Puckett) The red color is hydrogen gas energized by a hot star - it's an emission nebula. The “stem” is formed by a trail of the same glowing hydrogen gas. The nebula is 5000 light years away in the constellation Monoceros.Mona Evans "Monoceros the Unicorn"

A group of baby stars form a "stellar snowflake" in Spitzer Telescope observations of a dusty region near the Cone Nebula. It's sometimes called the Snowflake Cluster. Mona Evans, "Cosmic White Christmas"

NGC 1514, discovered by William Herschel in 1790. It's also known as the Crystal Ball nebula and this image, which is the result of 10 hours of exposure using 4 filters, it certainly looks like one. Herschel would have loved seeing it like this! (Image credit: Adam Block/Mount Lemmon SkyCenter/University of Arizona) Mona Evans, "Nebulae"

R Sculptoris. This is a dying star shedding its outer layers. The image was captured by the Atacama Large Millimeter Array (ALMA) high in the Chilean desert. The planetary nebula is visible in radio emission, which is invisible to our eyes. Mona Evans, "Cosmic White Christmas"

Helix nebula. Images from two telescopes, Spitzer (in infrared) and GALEX (in uv) were combined to get this beautiful image. There was also a bit of input for the area beyond the nebula from NASA’s all-sky Wide-field Infrared Survey Explorer (WISE). ©Mona Evans, “Nebulae”

Peony nebula star - WR 102ka - is located in the Peony nebula, the reddish cloud of dust in and around the white circle, surrounding the star. (Image: Spitzer Space Telescope) Mona Evans, "Nebulae"