life of a star
DESCRIPTION
Life of a Star. By Caitlin Shroyer and Angelleigh Gonzales. HOW ARE STARS FORMED?. The star goes through many stages and they are: Small-medium stars Nebula Protostar Main Sequence Massive Main Sequence(High Mass Star) Red Giant Super Red Giant (High Mass Star) - PowerPoint PPT PresentationTRANSCRIPT
HOW ARE STARS FORMED? The star goes through many stages and they are: Small-medium stars Nebula Protostar Main Sequence Massive Main Sequence(High Mass Star) Red Giant Super Red Giant (High Mass Star) Supernova(High Mass Star) Neutron Star (High Mass Star ) Black Hole(High Mass Star) Planetary Nebula White Dwarf Black Dwarf
NEBULAIt’s made up of dust and dust particlesThe gravity begins to pull the particles in the
nebula together.
www. skyimagelab.com/m16-eagle-spire- wire.html
notes-formation of
stars
PROTOSTARA protostar is a dense area of gases in a nebula
that might become a star. If a protostar never gets larger than 1/10th mass
of the sun it becomes a brown dwarf.www. aspire.cosmic-ray.orgNotes-formation of stars
Brown DwarfBrown dwarfs never hot enough to start
fusion They shine dimly, but slowly cool off. The
Brown Dwarf is the 3rd stage of a star. www. Reorbit.comNote-formation of a star
Main SequenceThe temperature and pressure keep
increasing. Hydrogen begins to fuse together. The protostar officially becomes a star when
fusion begins. The star is now in the Main Sequence.The Main Sequence is similar to MassiveMain sequence but it’s larger. The Main Sequence is smaller. www. Crdlx5.yerpli.am/sun-pics/index.php?spgmGal=sunpics&spgmPic=6&spgmFilters=#pic Notes-formation of stars
Massive Main SequenceThe Massive Main Sequence stars are the larger type of
the building of a star. During the phases of a star it’s like the middle part of the making of a star.
www.asrtocu.unam.mx/massive_stars/Notes-formation of a star
Red Giant Because it has run out of fuel, the star begins to cool, and
contract. The outer layers of the star fall inwards under gravity, and as they fall they heat up. A shell surrounding the central core becomes hot enough to fuse protons into alphas. So the star gains a new source of energy. The core of the star is now hotter than it was during its normal life and this heat causes the outer parts of the star to swell. The star becomes a giant. The radiation from the fusing shell has grown weak by the time it reaches the surface of the star. Weak radiation is red, so the star becomes a red giant.
www. Historyoftheuniverse.com Motes-formation of a star
Red Supergiant A red supergiant is the bigger version of a red giant - so far no surprise. But
with these stars with more than 8 to 10 solar masses (the exact value is still uncertain) the production of energy doesn't stop at helium or carbon.A red supergiant is made of several layers. The outer hull of red glowing hydrogen and helium is inactive. Below this is a layer in which hydrogen is fusioned to helium. In the next layer helium is fusioned to carbon. So it goes on until in the core iron is made. The supergiant shines extremely bright, but only for a short time (still several hundred thousand to million years). In the end the phase in which the star fusions sulfur and silicon to iron only lasts a few days to weeks. From iron no more energy can be made. The core cools down and implodes. The following supernova (of type II) disrupts the star and leaves a tiny neutron star or a black hole behind.
www.hubblesite.org
Notes-formation of stars
Supernova A supernova is a final, gigantic explosion of
a supergiant star at the end of it’s life.A supernova lasts for weeks or so, but shines
as bright as a galaxy of 100 billion ordinary stars.
www. Oberlin.edu/physics/Astronomy/supernova/index.com www.familyhomesnetwork.com/facts/supernova.facts.html