Small ppt about black holes. Can use for school or University presentation for training. Easy to explain. Less information to talk about and Provides the basic information.

1. BLACK HOLE
NAME: CHAITRA P
USN:1RN18CS033

2. CONTENTS
► Introduction
► History
► Parts of a Black Hole
► How a Black Hole is formed
► Classification of Black Holes
► Closest and Largest Black Holes
► NASA’s Picture

3. What is a Black Hole?
An unimaginably dense region of space where space is curved around it
completely and gravity becomes so strong that nothing, not even light, can
escape.
Mass is so great in such a small volume that the velocity needed to escape is
greater than the speed of light.

4. History
► Einstein published the Theory of Gravity in 1916.
► Karl Schwarzschild solved Einstein’s equations for the case of black hole,
which he envisioned as a spherical volume of warped space surrounding
a concentrated mass and completely invisible to the outside world.

5. Parts of a Black Hole
4 Main parts:
► Singularity
► Event Horizon
► Relativistic Jet
► Accretion Disk

6. How a Black Hole is Formed?
► Basically an exploding star
► Inside a star, the nuclear fuel of a star
and its own gravity collide. This creates
stability, but when it runs out of nuclear
fuel, gravity compresses the star.
► The outer layers explode into a
supernova, and the center implodes
(collapses inwardly). After that, a black
hole is created. This only occurs in big
stars, which are at least 10 times bigger
than the sun

7. Classification of Black Holes
3 classifications:
► Stellar mass: 3 to 20 times the mass of our Sun.
► Supermassive: Black holes which are millions to billions times the mass of
our Sun.
► Mid Mass: In between stellar mass and supermassive.

8. Closest and Largest Black Holes
The closest black hole to Earth is about 1,000 light-years away, or roughly 9.5
thousand, million, million km, in the Constellation Telescopium. That might not
sound very close, but on the scale of the Universe, it's actually right next door.
Currently the largest known black hole, powering the quasar TON 618, has a
mass of 66 billion solar masses. TON 618's enormous bulk led scientists to
speculate whether or not even larger black holes exist, and if there is any
upper limit to their sizes.

9. NASA’s Picture of a Black Hole
A black hole and its shadow have been captured
in an image for the first time, a historic feat by an
international network of radio telescopes called
the Event Horizon Telescope (EHT).
The stunning new image shows the shadow of the
supermassive black hole in the center of Messier 87
(M87), an elliptical galaxy some 55 million light-
years from Earth. This black hole is 6.5 billion times
the mass of the Sun.

10. Thank you