BLACK HOLE Albert Einstein invented black holes First, it was denied Today’s technology confirm that black holes exist.

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THE LIFE CYCLE OF STARS Chapter 15-2 Part 3.
THE LIFE CYCLE OF STARS Chapter 15-2 Part 3.
THE LIFE CYCLE OF STARS Chapter 15-2 Part 3.
THE LIFE CYCLE OF STARS Chapter 15-2 Part 3.
Presentation transcript:

BLACK HOLE Albert Einstein invented black holes First, it was denied Today’s technology confirm that black holes exist

WHAT IS A BLACK HOLE? - A region of spacetime from which nothing can escape - It comes from stars -a star spends all its energy -contracts -pulls things inside its own -the center singularity -border event horizon -no time and no event inside it

DO THEY REALLY EXIST? - Impossible to see - When the fuel finishes, explode into a supernova - radio, telescopes find this - Lots of black holes is seen

EXAMPLE 1.M87 Active galaxy Lots of interesting objects There is a spiral-shaped disc of hot gas It is not big, but it weighs three billion times as much as the sun So the gravity is so strong

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