Transcript Black Hole

Black Hole
• Extremely dense point = Singularity –
Bottom of the funnel
• Billion tons/golf ball
• Enormous gravity field
• Light cannot escape from a black hole
• Looks like a funnel
• Top of Funnel = Event Horizon
Black Holes come from
Collapsed Massive Stars
• Massive > 8 solar masses
• F=(M1xM2)/dist^2 (Newton’s universal law of
gravitation
• Massive star has to go supernova
• Supernova is a star which explodes
• Proton-proton chain reaction = Nuclear Fusion
• Burn H into He – Sun wants to explode all the
time
Proton-Proton (Nuclear Force) v
Gravity
• Nuclear furnace goes out when runs out of fuel
• H->He->O->…->Fe
• Star core fusion produces energy until it starts to
burn Fe . . . Now it requires energy!
• The core no longer can win against gravity
• Star collapses into the core
• Rebounds
• Spews elements 1-92 into space
Neutron Star
• Something left over in the core is either a
neutron star or , if the progenitor star was
very massive, a black hole.
Element Synthesis
• Elements 1-26 are forged in ordinary stars
• Heavy elements up to 92 are formed by
supernovas
• Strong Nuclear Force (double-sided sticky tape)
holds the protons (+) together
• Protons that get smashed together stay together
• Supernovas occur every second in the universe
Space-Time Continuum (the
fourth dimension)
• Arrow of time points forward
• Law of Entropy – disorder increases with
time (things left to themselves)
• Masses on a space-time continuum for an
indent called a gravity well and it loks like a
funnel