Jeans mass

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• Jeans instability — The Jeans instability causes the collapse of interstellar gas clouds and subsequent star formation. It occurs when the internal gas pressure is not strong enough to prevent gravitational collapse of a region filled with matter. For stability, the …   Wikipedia

• Jeans length — is the critical radius of a cloud (typically a cloud of interstellar dust) where thermal energy, which causes the cloud to expand, is counteracted by gravity, which causes the cloud to collapse. It is named after the British astronomer Sir James… …   Wikipedia

• Mass customization — Mass customization, in marketing, manufacturing, call centres and management, is the use of flexible computer aided manufacturing systems to produce custom output. Those systems combine the low unit costs of mass production processes with the… …   Wikipedia

• James Hopwood Jeans — Infobox Scientist name = James Hopwood Jeans box width = image width = 240px caption = giving the 1933 Royal Institution Christmas Lectures birth date = birth date|1877|09|11 birth place = Ormskirk, Lancashire, England death date = death date and …   Wikipedia

• Orders of magnitude (mass) — Iron weights up to 50 kilograms depicted in Dictionnaire encyclopédique de l épicerie et des industries annexes. To help compare different orders of magnitude, the following list describes various mass levels between 10−36 kg and 1060 kg …   Wikipedia

• Bonnor-Ebert mass — In astrophysics, the Bonnor Ebert mass is the largest mass that an isothermal gas sphere embedded in a pressurized medium can have while still remaining in hydrostatic equilibrium.Clouds of gas with masses greater than the Bonnor Ebert mass must… …   Wikipedia

• 2763 Jeans — Infobox Planet minorplanet = yes width = 25em bgcolour = #FFFFC0 apsis = name = Jeans symbol = caption = discovery = yes discovery ref = discoverer = E. Bowell discovery site = Flagstaff (AM) discovered = July 24, 1982 designations = yes mp name …   Wikipedia

• Leonard-Merritt mass estimator — The Leonard Merritt mass estimator is a formula firstderived by Peter Leonard and David Merritt [Leonard, P. and Merritt, D. (1989). [http://adsabs.harvard.edu/abs/1989ApJ...339..195L| The mass of the open star cluster M35 as derived from proper… …   Wikipedia

• Equipartition theorem — [ Thermal motion of an α helical peptide. The jittery motion is random and complex, and the energy of any particular atom can fluctuate wildly. Nevertheless, the equipartition theorem allows the average kinetic energy of each atom to be computed …   Wikipedia

• Protostar — A protostar is a large object that forms by contraction out of the gas of a giant molecular cloud in the interstellar medium. The protostellar phase is an early stage in the process of star formation. For a solar mass star it lasts about 100,000… …   Wikipedia

• Star formation — is the process by which dense parts of molecular clouds collapse into a ball of plasma to form a star. As a branch of astronomy star formation includes the study of the interstellar medium and giant molecular clouds as precursors to the star… …   Wikipedia