Image Title: A Reflection Nebula in Orionīased on press release for PHOTO NO. A nebula starts with a cloud of interstellar dust. New stars may be forming inside Bok globules, throughthe contraction of the dust and molecular gas under their own gravity. While searching for young stars and their circumstellar disks, Hubble captured a classic reflection nebula. In the Hubble image,the globule is seen silhouetted against the reflection nebula illuminatedby V380 Orionis. 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 exampleof a "Bok globule," named after the late University of Arizona astronomerBart Bok. A box in the ground-based infrared image of M78 at left shows the location of Hubble’s close-up infrared view on the right. This image of NGC 1999 shows a remarkable jet-black cloud nearits center, resembling a letter T tilted on its side, located just to theright and lower right of the bright star. Herbig-Haroobjects are now known to be jets of gas ejected from very young stars. The nebula is famous in astronomical history because thefirst Herbig-Haro object was discovered immediately adjacent to it. NGC 1999 lies close to the famous Orion Nebula, about 1,500 light-yearsfrom Earth, in a region of our Milky Way galaxy where new stars are beingformed actively. The star is so young that it is still surrounded by a cloudof material left over from its formation, here seen as the NGC 1999 reflectionnebula. M57 is about 2,000 light-years away in the constellation Lyra, and is best observed during August. The tiny white dot in the center of the nebula is the star’s hot core, called a white dwarf. Its mass is estimated to be 3.5 times thatof the Sun. Messier 57 (The Ring Nebula) M57, or the Ring Nebula, is a planetary nebula, the glowing remains of a sun-like star. Its white coloris due to its surface temperature of about 10,000 degrees Celsius (nearlytwice that of our own Sun). It illuminated by a bright, recently formedstar V380 Orionis, visible just to the left of center. Astronomy CD ROM I - NGC 1999 a Reflection Nebula in Orion NGC 1999 a Reflection Nebula in Orion From the Hubble Space Telescope NGC 1999 is a reflection nebula which shines only because lightfrom an embedded source illuminates its dust the nebula does not emitany visible light of its own. Novem11:13 AM IST 1 min read Follow us on Hubble's sharp eye captures a protostar designated J1672835.29-763111.64 in the reflection nebula IC 2631.
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