Star Formation and Lifetime free download, Star Formation and Lifetime download on software download

Star Formation and Lifetime is a little Java application designed to enable users to understand the principles of stars and build one of their own. In the lower right corner (light blue panel) there are 2 sliders, which can be used to adjust the radius and the temperature of the star you build. The radius and the temperature of your star are the only inputs for this simulation. You can also type directly into the 2 boxes that display numbers below the sliders. This is important if you want to enter a number that is outside the range of the sliders. In the lower left corner (pink panel) values are displayed for the star you have created. Values are displayed here for the peak wavelength of emission, the energy output in Solar Units (SUs), the estimated mass in SUs (only good for main sequence stars),and the estimated lifespan of your star. The black body spectrum is displayed in the middle panel on the right side (beige panel). The surface area of the star is taken into account, and the Y axis of the graph is in SUs, 1 SU being the height of the peak from our sun. The upper left panel (light purple) displays the star, with the color as it would appear. The middle panel on the left (medium blue) displays both the peak wavelength and the star appearance. The panel in the upper right corner is the real heart and soul of this simulation. This is a Hertsprung Russell diagram, also known as an HR diagram. This is a log-log plot. Luminosity is on the Y axis, and goes from .0001 to 100,000 SUs. The X axis is reversed, and goes from 2500 Kelvins on the right to 40,000 Kelvins on the left side. The yellow squares are plots of individual main sequence stars. While stars do exist that are not on the main sequence, these will not be stable stars in the prime of life. Stars above and to the right of the main sequence stars are red giants, and nearing the end of their lives as stars. Stars below and to the left of the main sequence are white dwarves, and are even closer the end of their lives then the red giants. The stars you create should be main sequence stars, and you will find it necessary to adjust the temperature and radius of your star, with one eye on the estimated mass display, to create realistic and stable main sequence stars of a given mass. Your star will appear as a red dot on the HR diagra

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