Keyword: orionnebula

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  • Astronomy Picture of the Day -- Reflections on the 1970s

    12/20/2014 6:50:51 AM PST · by SunkenCiv · 24 replies
    NASA ^ | December 19, 2014 | (see photo credit)
    Explanation: The 1970s are sometimes ignored by astronomers, like this beautiful grouping of reflection nebulae in Orion - NGC 1977, NGC 1975, and NGC 1973 - usually overlooked in favor of the substantial glow from the nearby stellar nursery better known as the Orion Nebula. Found along Orion's sword just north of the bright Orion Nebula complex, these reflection nebulae are also associated with Orion's giant molecular cloud about 1,500 light-years away, but are dominated by the characteristic blue color of interstellar dust reflecting light from hot young stars. In this sharp color image a portion of the Orion Nebula...
  • Astronomy Picture of the Day -- M42: Inside the Orion Nebula

    04/08/2014 10:38:50 AM PDT · by SunkenCiv · 45 replies
    NASA ^ | April 08, 2014 | (see photo credit)
    Explanation: The Great Nebula in Orion, an immense, nearby starbirth region, is probably the most famous of all astronomical nebulas. Here, glowing gas surrounds hot young stars at the edge of an immense interstellar molecular cloud only 1500 light-years away. In the above deep image composite in assigned colors taken by the Hubble Space Telescope wisps and sheets of dust and gas are particularly evident. The Great Nebula in Orion can be found with the unaided eye near the easily identifiable belt of three stars in the popular constellation Orion. In addition to housing a bright open cluster of stars...
  • Astronomy Picture of the Day -- Orion Nebula in Surrounding Dust

    03/25/2014 6:35:13 AM PDT · by SunkenCiv · 19 replies
    NASA ^ | March 25, 2014 | (see photo credit)
    Explanation: What surrounds a hotbed of star formation? In the case of the Orion Nebula -- dust. The entire Orion field, located about 1600 light years away, is inundated with intricate and picturesque filaments of dust. Opaque to visible light, dust is created in the outer atmosphere of massive cool stars and expelled by a strong outer wind of particles. The Trapezium and other forming star clusters are embedded in the nebula. The intricate filaments of dust surrounding M42 and M43 appear gray in the above image, while central glowing gas is highlighted in brown and blue. Over the next...
  • Astronomy Picture of the Day -- The Gegenschein Over Chile

    01/14/2014 4:49:49 PM PST · by SunkenCiv · 9 replies
    NASA ^ | January 14, 2014 | (see photo credit)
    Explanation: Is the night sky darkest in the direction opposite the Sun? No. In fact, a rarely discernable faint glow known as the gegenschein (German for "counter glow") can be seen 180 degrees around from the Sun in an extremely dark sky. The gegenschein is sunlight back-scattered off small interplanetary dust particles. These dust particles are millimeter sized splinters from asteroids and orbit in the ecliptic plane of the planets. Pictured above from last year is one of the more spectacular pictures of the gegenschein yet taken. Here a deep exposure of an extremely dark sky over Las Campanas Observatory...
  • Astronomy Picture of the Day -- Horsehead and Orion Nebulas

    10/29/2013 3:20:25 AM PDT · by SunkenCiv · 4 replies
    NASA ^ | October 29, 2013 | (see photo credit)
    Explanation: The dark Horsehead Nebula and the glowing Orion Nebula are contrasting cosmic vistas. Adrift 1,500 light-years away in one of the night sky's most recognizable constellations, they appear in opposite corners of the above stunning mosaic. The familiar Horsehead nebula appears as a dark cloud, a small silhouette notched against the long red glow at the lower left. Alnitak is the easternmost star in Orion's belt and is seen as the brightest star to the left of the Horsehead. Below Alnitak is the Flame Nebula, with clouds of bright emission and dramatic dark dust lanes. The magnificent emission region,...
  • Astronomy Picture of the Day -- Orion Nebula in Oxygen, Hydrogen, and Sulfur

    06/05/2013 6:15:07 PM PDT · by SunkenCiv · 12 replies
    NASA ^ | June 04, 2013 | (see photo credit)
    Explanation: Few astronomical sights excite the imagination like the nearby stellar nursery known as the Orion Nebula. The Nebula's glowing gas surrounds hot young stars at the edge of an immense interstellar molecular cloud. Many of the filamentary structures visible in the above image are actually shock waves - fronts where fast moving material encounters slow moving gas. The Orion Nebula spans about 40 light years and is located about 1500 light years away in the same spiral arm of our Galaxy as the Sun. The Great Nebula in Orion can be found with the unaided eye just below and...
  • Astronomy Picture of the Day -- The Horsehead Nebula in Infrared from Hubble

    04/22/2013 6:15:40 PM PDT · by SunkenCiv · 21 replies
    NASA ^ | April 22, 2013 | (see photo credit)
    Explanation: While drifting through the cosmos, a magnificent interstellar dust cloud became sculpted by stellar winds and radiation to assume a recognizable shape. Fittingly named the Horsehead Nebula, it is embedded in the vast and complex Orion Nebula (M42). A potentially rewarding but difficult object to view personally with a small telescope, the above gorgeously detailed image was recently taken in infrared light by the orbiting Hubble Space Telescope in honor of the 23rd anniversary of Hubble's launch. The dark molecular cloud, roughly 1,500 light years distant, is cataloged as Barnard 33 and is seen above primarily because it is...
  • Astronomy Picture of the Day -- M42: Inside the Orion Nebula

    03/20/2013 3:37:27 PM PDT · by SunkenCiv · 6 replies
    NASA ^ | March 20, 2013 | (see photo credit)
    Explanation: The Great Nebula in Orion, an immense, nearby starbirth region, is probably the most famous of all astronomical nebulas. Here, glowing gas surrounds hot young stars at the edge of an immense interstellar molecular cloud only 1500 light-years away. In the above deep image in assigned colors highlighted by emission in oxygen and hydrogen, wisps and sheets of dust and gas are particularly evident. The Great Nebula in Orion can be found with the unaided eye near the easily identifiable belt of three stars in the popular constellation Orion. In addition to housing a bright open cluster of stars...
  • Astronomy Picture of the Day -- Infrared Orion from WISE

    02/13/2013 4:12:21 AM PST · by SunkenCiv · 8 replies
    NASA ^ | February 13, 2013 | (see photo credit)
    Explanation: The Great Nebula in Orion is a intriguing place. Visible to the unaided eye, it appears as a small fuzzy patch in the constellation of Orion. But this image, an illusory-color composite of four colors of infrared light taken with the Earth orbiting WISE observatory, shows the Orion Nebula to be a bustling neighborhood or recently formed stars, hot gas, and dark dust. The power behind much of the Orion Nebula (M42) is the stars of the Trapezium star cluster, seen near the center of the above wide field image. The eerie green glow surrounding the bright stars pictured...
  • Astronomy Picture of the Day -- L Ori and the Orion Nebula

    02/02/2013 9:25:36 PM PST · by SunkenCiv · 25 replies
    NASA ^ | February 03, 2013 | (see photo credit)
    Explanation: This esthetic close-up of cosmic clouds and stellar winds features LL Orionis, interacting with the Orion Nebula flow. Adrift in Orion's stellar nursery and still in its formative years, variable star LL Orionis produces a wind more energetic than the wind from our own middle-aged Sun. As the fast stellar wind runs into slow moving gas a shock front is formed, analogous to the bow wave of a boat moving through water or a plane traveling at supersonic speed. The small, arcing, graceful structure just above and left of center is LL Ori's cosmic bow shock, measuring about half...
  • Astronomy Picture of the Day -- The Orion Bullets

    01/10/2013 3:45:10 AM PST · by SunkenCiv · 10 replies
    NASA ^ | January 10, 2012 | (see photo credit)
    Explanation: Cosmic bullets pierce the outskirts of the Orion Nebula some 1500 light-years distant in this sharp infrared close-up. Blasted out by energetic massive star formation the bullets, relatively dense, hot gas clouds about ten times the size of Pluto's orbit, are blue in the false color image. Glowing with the light of ionized iron atoms they travel at speeds of hundreds of kilometers per second, their passage traced by yellowish trails of the nebula's shock-heated hydrogen gas. The cone-shaped wakes are up to a fifth of a light-year long. The detailed image was created using the 8.1 meter Gemini...
  • Astronomy Picture of the Day -- At the Heart of Orion

    10/06/2012 1:07:39 AM PDT · by SunkenCiv · 5 replies
    NASA ^ | October 06, 2012 | (see photo credit)
    Explanation: Near the center of this sharp cosmic portrait, at the heart of the Orion Nebula, are four hot, massive stars known as the Trapezium. Gathered within a region about 1.5 light-years in radius, they dominate the core of the dense Orion Nebula Star Cluster. Ultraviolet ionizing radiation from the Trapezium stars, mostly from the brightest star Theta 1 Orionis C powers the complex star forming region's entire visible glow. About three million years old, the Orion Nebula Cluster was even more compact in its younger years and a recent dynamical study indicates that runaway stellar collisions at an earlier...
  • Astronomy Picture of the Day -- Orion Nebula: The Hubble View

    07/15/2012 2:41:20 PM PDT · by SunkenCiv · 12 replies
    NASA ^ | July 15, 2012 | (see photo credit)
    Explanation: Few cosmic vistas excite the imagination like the Orion Nebula. Also known as M42, the nebula's glowing gas surrounds hot young stars at the edge of an immense interstellar molecular cloud only 1,500 light-years away. The Orion Nebula offers one of the best opportunities to study how stars are born partly because it is the nearest large star-forming region, but also because the nebula's energetic stars have blown away obscuring gas and dust clouds that would otherwise block our view - providing an intimate look at a range of ongoing stages of starbirth and evolution. This detailed image of...
  • Astronomy Picture of the Day -- Dust of the Orion Nebula

    02/06/2012 4:26:18 AM PST · by SunkenCiv · 6 replies
    NASA ^ | February 06, 2012 | (see photo credit)
    Explanation: What surrounds a hotbed of star formation? In the case of the Orion Nebula -- dust. The entire Orion field, located about 1600 light years away, is inundated with intricate and picturesque filaments of dust. Opaque to visible light, dust is created in the outer atmosphere of massive cool stars and expelled by a strong outer wind of particles. The Trapezium and other forming star clusters are embedded in the nebula. The intricate filaments of dust surrounding M42 and M43 appear brown in the above image, while central glowing gas is highlighted in red. Over the next few million...
  • Life-Enabling Molecules Spotted in Orion Nebula

    03/12/2010 12:23:50 PM PST · by NormsRevenge · 25 replies · 561+ views
    Space.com ^ | 3/12/10 | sp
    The chemical fingerprints of potentially life-building molecules have been detected in the Orion nebula by Europe's Herschel Space Observatory. The Orion nebula is a nearby stellar nursery, brimming with gas, dust and infant stars. It is known to be one of the most prolific chemical factories in space, although the full extent of its chemistry and the pathways for molecule formation are not well understood. Researchers have used one of Herschel's instruments, which looks at the cosmos in the far infrared wavelengths of light, to provide more insight into how organic molecules form in space. By sifting through the pattern...
  • Cosmic Bullets Pierce Space Cloud (Orion Nebula)

    03/24/2007 7:52:29 PM PDT · by NormsRevenge · 24 replies · 2,780+ views
    Space.com on Yahoo ^ | 3/22/07 | Ker Than
    Astronomers just got their most detailed look yet at supersonic 'bullets' of gas piercing through dense clouds of hydrogen gas in the Orion Nebula. Each bullet [image] is about ten times the size of Pluto's orbit around the Sun and travels through the clouds at up to 250 miles (400 kilometers) per second-or about a thousand times faster than the speed of sound. The bulk of both the bullets and the surrounding gas cloud [image] consists of molecular hydrogen. The tip of each bullet is packed with iron atoms that are heated by friction and glow bright blue in the...