THE BLACK HOLE

BYSENTHIL KUMAR.C

What is a black hole?OBlack holes are places where

ordinary gravity has become so extreme that it overwhelms all other forces in the Universe. Once inside, nothing can escape a black hole's gravity — not even light.

French scientist Pierre-Simon Laplace (1749-1827) was one of the first to discuss the possible existence of black holes.

American physicist John Archibald Wheeler first introduced the term black hole in 1967 and led many important studies into their properties.

How do Black Holes form?

OBlack Holes form when massive stars which has 8 times the mass of the sun dies.

OThe energy released by those stars in few seconds is equal to the energy released by the sun in an year.

CREATION OF A BLACK HOLE (DEAD OF A STAR)

Right there is a brand new Black Hole

GRAVITY & LIGHT VS BLACK HOLE

Stellar-mass black holes are created when massive stars explode as supernovae. The image shows a supernova remnant in the constellation Cassiopeia.

Collisions of galaxies contribute to the growth of supermassive black holes. The image show the ''Antennae,'' a pair of colliding galaxies.

The Large Hadron Collider is a 17-mile long particle accelerator in Switzerland that may reach energies high enough to create miniscule black holes.

Where are they?OThere are uncountable

black holes in the universe.OBlack holes are in between

each of the galaxies. There are millions to billions black holes in space.

How many Black holes are there?

A very small patch of our Milky Way galaxy in the constellation Sagittarius. In total, our galaxy contains some 100 billion stars and 100 million black holes.

Any small patch of the sky shows many distant galaxies. Each probably contains a supermassive black hole and millions of stellar-mass black holes.

Sagittarius A* - The supermassive black hole in the center of our galaxy “The Milky Way”

How do astronomers detect where they are?• Black holes can detected by their

gravitational effects on nearby stars or by the intense core of light they produce in the center of galaxies when astronomers studies the speed of the gases in the cores of such galaxies.

• By these observations, they calculate the mass and power of the black holes.

KECK OBSERVATORYHAWAII

OUR MILKY WAY IN VERGE OF EXTINCTION

Andromeda Milky Way

Collision of Galaxies

MilkDromeda

CAN WE SAFELY ORBIT A BLACK HOLE!If you launch your spaceship with low speed, you will spiral into the black hole.

If you launch your spaceship with high speed, you will fly into the far off distance.

There is exactly one launch speed that will put you on a circular orbit around the black hole.

If you launch your spaceship with intermediate speed, you will orbit the black hole in a complicated pattern known as a rosetta orbit.

Thank you for your kind attention!