* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Life Cycle of Stars
Corona Australis wikipedia , lookup
Formation and evolution of the Solar System wikipedia , lookup
Theoretical astronomy wikipedia , lookup
Cassiopeia (constellation) wikipedia , lookup
Spitzer Space Telescope wikipedia , lookup
Star of Bethlehem wikipedia , lookup
Dyson sphere wikipedia , lookup
Perseus (constellation) wikipedia , lookup
Nebular hypothesis wikipedia , lookup
Planetary habitability wikipedia , lookup
Aquarius (constellation) wikipedia , lookup
Crab Nebula wikipedia , lookup
Cygnus (constellation) wikipedia , lookup
Stellar kinematics wikipedia , lookup
Astronomical spectroscopy wikipedia , lookup
Timeline of astronomy wikipedia , lookup
Corvus (constellation) wikipedia , lookup
Life Cycle of Stars • Stars form from Stars clouds of gas and dust to create Nebula • Nebula – cold, dense, dark • Gravity pulls on the nebula causing it to collapse and form a protostar Protostar • Continues to pull in surrounding gas • When hot enough = nuclear fusion begins • Once the gas and dust blow away, the star can be seen • All stars (low and high mass) start out here •When atomic nuclei form a nucleus •Hydrogen fuses into helium •All stars (low and high mass) go through this •How long a star lives depends on its mass •Small stars use their fuel slow = longer lives Nuclear Fusion Protostar → Main Sequence - Sun-like Star → → Giants •Giants are larger because of the gasses have expanded. •Runs out of hydrogen, so it expands as it uses helium for fuel. •Giants are also red in color due to a lower surface temperature (cools as it expands). Life cycle of a •Stops producing energy when helium is exhausted •Gives off outer atmosphere as an expanding cloud low of dust mass star → Planetary Nebula → White Dwarf •Core of star becomes dense and hot, slowly giving off energy (runs out of fuel) •Very small (about size of Earth) •Shine for billions of years •As it cools = it dims = it dies out = → Black Dwarf •Completely cooled and dark (core made of carbon) Protostar →Main Sequence-Massive Stars(1.5-3 times the size of our sun)→ →Red Supergiants • • • Fusion of heavier elements Makes the star expand more Can be the size of our solar system (WOW!) →Supernova • • Star continues to expand, then it uses up all the nuclear fusion fuel = no energy remains Star begins to collapse because the core is too massive to be supported by pressure causing it to explode sending outer layers into space (the newly created elements are spread far & wide) →Black Hole • Core remains ● Supernova is so massive that it continues to →Neutron Star collapse • The collapsed core of a large star ● Most massive supergiants ● Invisible object that nothing can escape it, not • Small dense ball of neutrons even light ● Matter can be observed being pulled in by gravity Black Hole Video ● Matter becomes hot and emits x-rays we can see