H II regions are star-forming regions, places where stars are being born. It is very common to see such a nebula with flocks of hot, young stars within it. Those nebulas may be referred to asreflection nebulassince their clouds of gas and dust are illuminated by—or reflect—the light g...
In space, there are very cold and dense regions known as molecular clouds. A molecular cloud consists of a huge amount of gases and dust, from which stars and planets are finally formed. The typical physical conditions of molecular clouds are listed in Table 1. The number density of gas re...
Molecular cloudsare massive clouds of gas and dust out of which stars form. They’re called molecular clouds because they’re mostly molecular hydrogen, though they can contain many different compounds. Though the clouds are filamentary in nature, they do form clumps of greater density that someti...
All stars are born in the collapse of molecular clouds, vast pockets of dust, gas, and ice in space. These clouds can be seen from Earth; an example is the famous Pillars of Creation, whiich are some four light-years in length.
Collapsing clouds of dust and gas create new stars as they fall inward. Cloaked by dust and gas, the protostar grows massive enough to harness its power and begin the fusion process. In some cases, the material streaming onto the young star erupts into fiery jets that burst from the stellar...
In subject area: Physics and Astronomy Collapsing clouds refer to the process where a cloud of gas and dust undergoes gravitational collapse, leading to the formation of dense cores that eventually give rise to stars or stellar systems.
Smith, University of Minnesota/NOAO/AURA/NSF (Optical)) A stunning new image of the Carina nebula reveals cold, dusty cosmic clouds where violent and dynamic star formation is taking place. These clouds of dust and gas play host to some of the most massive and luminous stars in our ...
Where did all the stars go? What used to be considered a hole in the sky is now known to astronomers as a dark molecular cloud. Here, a high concentration of dust and molecular gas absorb practically all the visible light emitted from background stars. The eerily dark surroundings help mak...
As it nibbles away at the gas and dust that surrounds it, we can imagine the cloud disappearing in slow-mo fashion to become part of the young star, LkHa 259. I cropped the image to leave in three bright 11th- and 12th-magnitude stars that help in finding the object. DSS Located ...
Cosmic DustGalactic RadiationGas DensityH LinesData presently available on far infrared (10 鈥 300 m) thermal emission and carbon monoxide millimeter radiation are compiled in order to generate a sample of objects where the thermal radiation of the dust mixed with the molecular hydrogen can be ...