Types Of Stars Flashcards
Low mass stars
Less massive than the sun
Slow fusion rate
Caused by less gravity and pressure
Less energy needed to maintain balance of fusion a and gravity
Use up fuel more slowly than higher mass stars can burn for up to 100 billion years
Low mass start life cycle
Red dwarfs start dim and get dimmer
They lose their outer layers
Collapse and reheat a bit
Does as a white dwarf before cooling into a black dwarf
99% of stars in exhistance end as white dwarfs
Medium mass stars
Range from mass of the sun to 10x the suns mass
Fusion rate is only slightly height than low mass stars
Can burn up to 10 billion years
Fuse hydrogen at core for billions of years
End of medium mass stars life cycle
Hydrogen fuel runs out and they collapse under their own gravity
Reheats and temperatures and pressure increase from collapse and start burning helium
Reignited and outershells dwell
Becomes a red giant
Outer layers are ejected and interiors collapse into white dwarfs
White dwarfs cool down over billions of years
High mass stars
Burns hydrogen at furious rate high fusion rate
Lives are over in less than 100 million years
More than 10 times the mass of the sugravity pulls matter into the Center and squeezed the core,nuclear reactions accelerate
Hotter brighter and bluer than other stars
Always come to violent end
End of high mass starts
Use up hydrogen in 7 billion years
Collapses
Heating and compression causes helium to fuse results in tremendously high temperatures
Helium burns out collapses
Expand then collapse during this iron and many other elements are made at the core
Iron fuses and star collapses within minutes
Collapse is fast and intense core heats up to hundreds of millions of degrees and explodes
Supernova
Neutron Star
Mass 10-30 or 10-49 times the suns mass
Supernova causes atoms in core to compress and collapse forming neutrons
Becomes ball of neutrons about 15 km across
Takes millions of years to cool down
Densest material known
Black holes
Mass 49 plus or 29-100 times the mass of the sun
Core Goes under so much gravitational force that it becomes a black hole
