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In astronomy, the Ostriker–Peebles criterion, named after its discoverers Jeremiah Ostriker and Jim Peebles, describes the formation of barred galaxies.
The rotating disc of a spiral galaxy, consisting of stars and solar systems, may become unstable in a way that the stars in the outer parts of the "arms" are released from the galaxy system, resulting in the collapse of the remaining stars into a bar-shaped galaxy. This occurs in approximately 1/3 of the known spiral galaxies.
Based on the first kinetic energy component T and the total kinetic energy W, a galaxy will become barred when .
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26 yr old Radio Journalist Roman Crosser from Saint-Pascal, has many passions which include interior design, property developers housing in singapore singapore and rc model boats. Is a travel freak and these days made a vacation to Historic Centre of Ceský Krumlov.