star formation. 1) nebula cloud of interstellar gas and dust collapses due to its own gravity ...
TRANSCRIPT
STELLAR EVOLUTION
Star Formation
1) Nebula
Cloud of interstellar gas and dust Collapses due to its own gravity Begins Star Formation
2) Protostar
Rotating disk shape Hot condensed object at the center Fusion begins
3) Main Sequence Star
Fusing Hydrogen into Helium Longest phase of Sun’s Lifecycle
4) Red Giant
Sun expands beyond Venus’ orbit
5) Planetary Nebula
Outer layer of Star is driven off
6) White Dwarf
No longer Nuclear Supported by resistance of electrons
being squeezed together
7) Black Dwarf
Sun runs out of energy
Massive Stars
1) Nebula
2) Protostar
3) Main Sequence Star
4) Several Red Giant PhasesUntil iron has formed
Neutron Star
Extremely dense – 100 trillion times more dense than water
Very Small – a radius of approx. 10 km
Supernova
Massive explosion that blows off outer portion of neutron star
http://www.youtube.com/watch?v=0J8srN24pSQ
Black Hole
Only the most massive stars (20 times the size of the Sun)
Collapse of star continues forever Gravity so strong that light cannot
escape
http://www.youtube.com/watch?v=f_KLOFe2rDY