|
Once a protostar starts burning hydrogen in its core, it quickly passes through the T-Tauri stage (in a few million years) and becomes a main sequence star where its total mass determines all its structural properties. ... Hot, massive O stars age quickly and become red supergiants. Cooler, less massive G stars live for...
|
zebu.uoregon.edu/~js/ast122/lectures/lec14.html
|
|
|
|
Pressure and gravitational forces are equal, the star is stable and its core is sufficiently hot to fuse Hydrogen into Helium . Eventually the core of the main sequence star will become pure Helium and that will mark a new evolutionary phase for the star.
|
zebu.uoregon.edu/textbook/se.html
|
|
|
|
The properties of a main sequence star can be understood by considering the various physical processes acting in the interior. First is the hydrostatic balance, also called hydrostatic equilibrium. This determines the density structure of the star as the internal pressure gradient balances against the force of gravity.
|
imagine.gsfc.nasa.gov/docs/science/know_l2/stars.html
imagine.gsfc.nasa.gov/docs/science/know_l2/stars.html
|
|
|
5. When does a star become a main-sequence star? a. A star becomes a main-sequence star when it becomes luminous enough to emit thermal radiation. b. A star becomes a main-sequence star when a piece of a molecular cloud first begins to contract into a star.
|
boojum.as.arizona.edu/~jill/NS102_2004/chapter17key.htm...
boojum.as.arizona.edu/~jill/NS102_2004/chapter17key.html
|
|
Outlined below are each of the phases of the main sequence that takes place during a star's life. At the end of its main sequence, the star may become something not usually thought of as being a star. These final stages of a star's life are also outlined below.
|
library.thinkquest.org/12523/mainseq.html
library.thinkquest.org/12523/mainseq.html
|
|
Remember the order of the mass of stars (highest to lowest)...OBAFGKM. More massive stars merge onto the main sequence first. So, answer a, the O star will merge onto the main sequence first. I'll let you figure out the rest for yourself.
http://answers.yahoo.com/question/index?qid=20081118164...
|
|
The visible radiation emitted by white dwarfs varies over a wide color range, from the blue-white color of an O-type main sequence star to the red of a M-type red dwarf.[51] White dwarf effective surface temperatures extend from over 150,000K[25] to under 4,000K.[52][53] In accordance with the Stefan-Boltzmann law,
|
en.allexperts.com/q/Popular-Science-357/long-solar-whit...
en.allexperts.com/q/Popular-Science-357/long-solar-white-dwarf-1.htm
|
|
The nearest main sequence star to Earth, the Sun ... The set of images below shows the star going into a stage called Supernova and contracting to become a neutron star...
|
www.astro.keele.ac.uk/workx/starlife/StarpageS_26M.html
www.astro.keele.ac.uk/workx/starlife/StarpageS_26M.html
|
|
The star becomes a main sequence star. Eventually the H will be exhausted and gravity causes further ... The pulsar in the Crab Nebula, M1, in Taurus is the remnant of the supernova of AD1054 which, for a while, was so bright as to be visible in the daytime sky. Pulsars gradually slow down and become cold and dead.
|
www.astunit.com/tutorials/stellar.htm
|
|
