1) Communications satellite 2) Concept in cosmology
Found on
https://www.crosswordclues.com/clue/protostar
is a concentration of mass formed out of the contraction of a collapsing interstellar cloud. Once sufficient mass has fallen onto this central core, it becomes a pre-main-sequence star.
Found on
http://en.wikipedia.org/wiki/Glossary_of_astronomy
ProtoStar Ltd is a private company incorporated in Bermuda, with U.S. operations based in San Francisco, California and Asian operations based in Singapore. ProtoStar intended to operate an initial fleet of three geostationary satellites. Two satellites were acquired and launched. ProtoStar`s anchor customer, Dish TV India Limited, is the largest....
Found on
http://en.wikipedia.org/wiki/ProtoStar
A protostar is a large mass 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 one solar-mass star it lasts about 10,000,000 years. It starts with a core of increased density in a molecular cloud and ends with the formation...
Found on
http://en.wikipedia.org/wiki/Protostar
Cloud of hot, dense gas and dust that gravitationally collapses to form a star.
Found on
http://planetfacts.org/space-terms/
(from the article `nebula`) ...has been collapsing, it does not have a smooth density distribution but rather consists of a chaotic jumble of smaller clouds. These cloudlets ... ...of a molecular cloud, one or more of its cores become unstable and subject to gravitational collapse. Good arguments exist that the central ... Strong win...
Found on
http://www.britannica.com/eb/a-z/p/124
A stage in the evolution of a young star after it has fragmented from a interstellar gas cloud but before it has collapsed sufficiently for nuclear fusion reactions to begin. It may last from 100,000 to 10 million years, depending on the mass of the star. A protostar is surrounded by a dense cocoon ...
Found on
http://www.daviddarling.info/encyclopedia/P/protostar.html
Very dense regions (or cores) of molecular clouds where stars are in the process of forming.
Found on
http://www.encyclo.co.uk/local/20040
Dense regions of molecular clouds where stars are forming.
Found on
http://www.seasky.org/astronomy/astronomy-glossary.html
an early stage in the evolution of a star, after the beginning of the collapse of the gas cloud from which it is formed, but before sufficient contraction has occurred to permit initiation of nuclear reactions at its core.
Found on
https://www.infoplease.com/dictionary/protostar
No exact match found.
