How to Make a Black Hole Gravitys Power
How to Make a Black Hole
Gravity’s Power �
Gravity’s Power �Einstein views Gravity NOT as a force, but as a bending of spacetime �It still affects how things move, but not as an attractive force � It is pictured as a bent surface that the objects move along
Gravity’s Power �Around very massive objects, this bending of spacetime is very str 0 ng, so objects still move together �And it bends in all three dimensions, not just two!
Gravity’s Power �However it is imaged, or however it is explained, gravity is what drives the formation of stars �And their eventual destruction!
The Birthplace of a Star �Space is not just empty, even between celestial objects �Gas and dust exist (very, very sparse) �Some areas have denser masses of dust/gas �Very cold, so they do not emit radiation Dark Nebula Barnard 68
The Birth of a Star �Gravity causes gas/dust clouds to contract �With enough mass, becomes densely packed �With enough pressure, nuclear fusion begins �A star is born…. �Many times, groups are stars are formed
The Life of a Star �Hydrogen is fused together to make Helium �Energy is released as visible light and other EM radiations
The Types of Stars �During most of a stars life, a balance of gravity and energy production creates a stable dynamic �Sizes – Red dwarf to Blue Giant
The Fate of a Star �As fuel dwindles, stars become unstable �Swell to Red Giant stage �Final fate depends on mass
The Fate of a Star �Small mass –“Planetary nebula” to white dwarf to black dwarf (0. 4 to 8 times our Sun’s mass) �Massive –Supernova to neutron star (8 to 25 M) �Supermassive –Supernova to Black Hole (25+M)
Stellar Mass Black Holes • • • Has 5 to 10 times the mass of our Sun Can be found throughout a galaxy Remnants of single stars at the end of their cycle
Supermassive Black Holes Thought to be at the center of every galaxy Has the mass of hundreds of millions of Sun sized stars • Can sometimes create jets of hot gas shooting out from near the event horizon • •
Summary
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