How+did+it+form

media type="custom" key="3129950"HOME, Characteristics, Constellation, H-R Diagram, How did it form **Astronomers in the US believe they have figured out how stars form from clouds of gas. They say that all stars are created by the gravitational collapse of large molecular clumps, and that the rival "competitive accretion" model is not supported by observations .**

** There are two main models of star formation. Gravitational collapse is a top-down process in which molecular clumps that are hundreds of times heavier than the Sun fragment into gaseous cores, which then collapse to make individual stars. Competitive accretion, on the other hand, is bottom-up process: stars are born as small seeds that grow by accreting material from nearby clouds of gas and, sometimes, colliding with one another. **



Amer This is the link : http://physicsworld.com/cws/article/news/23622