The intense radiation from nearby hot O or B-type stars has evaporated the dust and driven away the gas around the smaller still-forming stars. very large in amount or degree. Near consuming regions or industry (natural gas-fired power plants). It is found in oil fields and natural gas fields, and in coal beds. Geology Porosity –how much volume can be stored. SICK has also expanded its range of dust measuring devices with the DUSTHUNTER SP100 Ex, which is certified for gas applications in Ex zone 2, and dust applications in Ex zone 22. large in amount or degree. To practice social or physical distancing stay at least 6 feet (about 2 arms’ length) from other people. dust cloud in air is not likely to occur in normal operation, and if so then for a short period only, either •Accumulations and layers of combustible dust are present •A hazardous atmosphere formed by dust cloud in air is likely to occur in normal operation, but not frequently and only for short periods •layers od combustible dust will in Close to pipelines and distribution systems. Permeability –determines the rate at which natural gas may be injected or withdrawn. Natural gas is a gaseous fossil fuel consisting primarily of methane. substantial adjective. very large in size or quantity. Words used to describe large amounts and quantities - thesaurus. huge adjective. One example of a totally exposed dust disk seen almost face-on is shown in the figure above. If we want to find stars still in the process of formation, we must look in places that have plenty of the raw material from which stars are assembled. large in size, amount, or degree. Structure. The remarkable feature of gases is that they appear to have no structure at all. great adjective. considerable adjective. extensive adjective. Gas, one of the three fundamental states of matter, with distinctly different properties from the liquid and solid states.. Social distancing, also called “physical distancing,” means keeping space between yourself and other people outside of your home. Synonyms. enormous adjective. In more than one case in the Orion Nebula, all of the gas has been blown away to leave just the dark dust disk with the protostar in the center.

Confinement –ability to hold gas … extremely large in number, amount, or degree. When methane-rich gases are produced by the anaerobic decay of non-fossil organic material, these are referred to as biogas. Since stars are made of gas, we focus our attention (and our telescopes) on the dense and cold clouds of gas and dust that dot the Milky Way (see Figure 21.1 and Figure 21.2 ).