BLACK HOLES

CONTENTS Definition History Formation Theory Types Parts Detection

BLACK HOLE A dense region in space where gravity pulls so much that even light can not get out.

The gravity is so strong because matter has been squeezed into a tiny space.

HISTORY Newton's laws in the late 1790s

Michell of England and Pierre la place of France

Suggested the existence of an Invisible star.

1967 John wheeler applied the term “Black Hole" to these collapsed objects

FORMATION When a very large star dies

Collapses or implodes under its own weight

It shrinks down to an infinitely dense point

TYPES OF BLACK HOLES Stellar Super Massive Miniature

WHAT DID EINSTEIN SAY ABOUT GRAVITY?

Objects and light moving near the massive object

are forced to take a curved path

around the object.

PARTS OF BLACK HOLE Event horizon Ergo sphere Accretion disk  Photon sphere  Singularity

FINDING BLACK HOLES Accretion disks and gas jets

Strong Radiation emissions

Gravitational lensing

COULD A BLACK HOLE DESTROY EARTH? Black holes do not wander around the universe

Earth would not fall into black hole

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