Calculations show that even graphite, which is black in bulk, reflects visible light well when dispersed into small particles. NGC 1999 is around 1350 light-years from Earth and lies near to the Orion Nebula, the closest region of massive star formation to Earth.

Please contact us if you want to publish a Nebula 2560x1440 wallpaper on our site. This peculiar portrait from the NASA/ESA Hubble Space Telescope showcases NGC 1999, a reflection nebula in the constellation Orion. We hope you enjoy our growing collection of HD images to use as a background or home screen for your smartphone or computer. Grains reflect light almost as well as fresh snow, more because of their favourable size (which promotes scattering rather than absorption) than their chemical composition. A collection of the top 53 Nebula 2560x1440 wallpapers and backgrounds available for download for free. This HD wallpaper is about lake, planet, surface, reflection, nebula, ringed planet, space art, Original wallpaper dimensions is 3840x2160px, file size is 489. Optical observations suggest that about 60–70 percent of the light is reflected rather than absorbed, while the corresponding fraction for Earth is only 35 percent and for the Moon a mere 5 percent. The extent and brightness of reflection nebulae show conclusively that dust grains are excellent reflectors in the broad range of wavelengths extending from the ultraviolet (as determined from observations from space) through the visible. The brightest reflection nebulae are illuminated by B-type stars that are very luminous but have temperatures lower than about 25,000 K, cooler than the O-type stars that would ionize the hydrogen in the gas and produce an H II region. The famous nebulosity in the Pleiades star cluster is of this type it was discovered in 1912 that the spectrum of this nebula mimics the absorption lines of the nearby stars, whereas bright nebulae that emit their own light show their own characteristic emission lines. Astronomers believe that new stars may be forming inside Bok globules, through the contraction of the dust and molecular gas under their own gravity.Reflection nebula, interstellar cloud that would normally be a dark nebula (or molecular cloud) but whose dust reflects the light from a nearby bright star that is not hot enough to ionize the cloud’s hydrogen. The globule is seen silhouetted against the reflection nebula illuminated by V380 Orionis. Download 4K wallpaper of Desert, Nebula, Milky Way, Starry sky, Astronomical, Squares, Dark, Dusk, Fusion, Illusion, Landscape, 747 from Nature category for desktop and mobile phones in high quality resolutions. The globule is a cold cloud of gas, molecules and cosmic dust, which is so dense it blocks all of the light behind it. This dark cloud is an example of a “Bok globule,” named after the late University of Arizona astronomer Bart Bok. NGC 1999 shows a remarkable jet-black cloud near its center, located just to the right and lower right of the bright star. The star is so young that it is still surrounded by a cloud of material left over from its formation, here seen as the NGC 1999 reflection nebula. Its mass is estimated to be 3.5 times that of the sun. This star is cataloged as V380 Orionis, and its white color is due to its high surface temperature of about 10,000 degrees Celsius, nearly twice that of our own sun. The nebula is illuminated by a bright, recently formed star, visible just to the left of center. wallpaperLock screen wallpaperiPhone wallpaper4K wallpaperSamsung wallpaperLove wallpaperMobile wallpaper.

NGC 7023 is relatively bright when compared to other reflection nebulae at magnitude 6. Free Mountain And Trees Reflection Stock Photo. This dramatic reflection nebula resides in the constellation Cepheus and includes plenty of dark interstellar dust in the area. INCLUDED are 7 different pieces and 3 BONUS pieces from the Nebula Wallpaper Pack: Emission - Wallpaper. IC2118 (aka Witch Head Nebula) is quite a faint reflection nebula in the Orion. Herbig-Haro objects are now known to be jets of gas ejected from very young stars. The Iris Nebula is one of many nebulae in the night sky with a common name associated with a flower. The nebula is famous in astronomical history because the first Herbig-Haro object was discovered immediately adjacent to it (it lies just outside the new Hubble image). Like fog around a street lamp, a reflection nebula shines only because the light from an embedded source illuminates its dust the nebula does not emit any visible light of its own. Just weeks after NASA astronauts repaired the Hubble Space Telescope in December 1999, the Hubble Heritage Project snapped this picture of NGC 1999, a reflection nebula in the constellation Orion.

Wallpaper reflection nebula