Isochrone Of Varignon
Isochrone may refer to: * Stellar isochrone, the curve on the Hertzsprung–Russell diagram representing stars of the same age *Isochrone curve, the curve (a cycloid) for which objects starting at different points finish at the same time and point when released *Isochrone map, shows areas related to isochrones between different points {{Disambiguation ...
[...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]  

Stellar Isochrone
In stellar evolution, an isochrone is a curve on the Hertzsprung-Russell diagram, representing a population of stars of the same age but with different mass. The Hertzsprung-Russell diagram plots a star's luminosity against its temperature, or equivalently, its color. Stars change their positions on the HR diagram throughout their life. Newborn stars of low or intermediate mass are born cold but extremely luminous. They contract and dim along the Hayashi track, decreasing in luminosity but staying at roughly the same temperature, until reaching the main sequence directly or by passing through the Henyey track. Stars evolve relatively slowly along the main sequence as they fuse hydrogen, and after the vast majority of their lifespan, all but the least massive stars become giants. They then evolve quickly towards their stellar endpoints: white dwarfs, neutron stars, or black holes. Isochrones can be used to date open clusters because their members all have roughly the same age. ...
[...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]