This document discusses black holes. It begins with a brief history of ideas about black holes from the 18th century to modern times. It then describes how black holes form from massive stars undergoing gravitational collapse at the end of their life cycles. It outlines the key characteristics of black holes, including their structures consisting of singularities surrounded by event horizons. The document also notes that black holes can continue growing by absorbing matter and merging with other objects. In conclusion, it states that while there is no limit to the size of black holes, the largest are likely in the centers of galaxies and contain billions of solar masses.
Hey I'm DIVYA SHREE NANDINI. I'm here with my new presentation on Black Hole. I'm sure you'll find it interesting. well first thing what is black hole- "Black hole, cosmic body of extremely intense gravity from which nothing, not even light, can escape. A black hole can be formed by the death of a massive star. When such a star has exhausted the internal thermonuclear fuels in its core at the end of its life, the core becomes unstable and gravitationally collapses inward upon itself, and the star’s outer layers are blown away. The crushing weight of constituent matter falling in from all sides compresses the dying star to a point of zero volume and infinite density called the singularity." wanna know more about it then come with me. :)
It is said that fact is sometimes stranger than fiction, and nowhere is this more true than in the case of black holes. Black holes are stranger than anything dreamt up by science fiction writers, but they are firmly matters of science ~fact.
"Black holes are where God divided by zero" - Albert Einstein
Black hole – A region in the space where the gravitational pull is so strong that neither substance nor light can leave this area.
Hey I'm DIVYA SHREE NANDINI. I'm here with my new presentation on Black Hole. I'm sure you'll find it interesting. well first thing what is black hole- "Black hole, cosmic body of extremely intense gravity from which nothing, not even light, can escape. A black hole can be formed by the death of a massive star. When such a star has exhausted the internal thermonuclear fuels in its core at the end of its life, the core becomes unstable and gravitationally collapses inward upon itself, and the star’s outer layers are blown away. The crushing weight of constituent matter falling in from all sides compresses the dying star to a point of zero volume and infinite density called the singularity." wanna know more about it then come with me. :)
It is said that fact is sometimes stranger than fiction, and nowhere is this more true than in the case of black holes. Black holes are stranger than anything dreamt up by science fiction writers, but they are firmly matters of science ~fact.
"Black holes are where God divided by zero" - Albert Einstein
Black hole – A region in the space where the gravitational pull is so strong that neither substance nor light can leave this area.
A presentation I gave to the Brighton Astronomy Society in Jan 2016 - http://brightonastro.com/ , https://www.facebook.com/brightonastro/
Annoyingly that's removed the videos from the slides, so here are links to those:
https://www.youtube.com/watch?v=e-P5IFTqB98&t=18s
(This Youtube channel "In a nutshell" is absolutely fantastic by the way and I highly recommend a look through their other videos!)
https://www.youtube.com/watch?v=duoHtJpo4GY
https://vimeo.com/8723702
I've also made my notes from preparing the slides available here as well:
https://docs.google.com/document/d/1gqgsAbvoCB_7-_gPToqOuSixc02YnU-ajf-uT60R1vc/edit?usp=sharing
-- there are LOTS of further links to interesting videos in there as well, that I didn't use on the night so worth a scan through.
Any further questions, feel free to ask in comments on here
This is a presentation on Black Holes.
This covers following data about Black Hole->
>>What is Black Hole.
>>History.
>>Parts of Black Hole.
>>Classification.
>>Closest Black Hole.
>>Largest Black Hole.
search on NASA site also go through the latest news related to black holes before presenting your seminar.
many queries are asked related to black holes.
present the astronomical data's for Good delivery of seminar.In the 18th century John Michell and Pierre-Simon Laplace first mentioned about the objects with a huge gravitation, from which even light cannot escape.
In 1915 Albert Einstein developed the theory of general relativity.
Karl Schwarzschild finds black holes as a solution to Einstein’s equations (1916)
Robert Oppenheimer and Hartland Snyder predict that massive stars can collapse into black holes (1939)
A black hole is a region of space that has so much mass concentrated in it that there is no way for a nearby object to escape its gravitational pull.”
Black holes are exotic structures whose gravitational fields are so powerful that they trap everything, even light. They were first postulated by Albert Einstein's theory of general relativity.”
This can happen when a star is dying.
Though they are black they are invisible to us.
The density of a black hole is so great it would be like taking the whole Earth and crushing into a volume smaller than a 1” marble!.
Stellar-mass: 3 to 20 times the mass of our Sun
Supermassive: Black holes with millions to billions of times the mass of our Sun
Mid-mass: In between stellar-mass and supermassive.
A presentation I gave to the Brighton Astronomy Society in Jan 2016 - http://brightonastro.com/ , https://www.facebook.com/brightonastro/
Annoyingly that's removed the videos from the slides, so here are links to those:
https://www.youtube.com/watch?v=e-P5IFTqB98&t=18s
(This Youtube channel "In a nutshell" is absolutely fantastic by the way and I highly recommend a look through their other videos!)
https://www.youtube.com/watch?v=duoHtJpo4GY
https://vimeo.com/8723702
I've also made my notes from preparing the slides available here as well:
https://docs.google.com/document/d/1gqgsAbvoCB_7-_gPToqOuSixc02YnU-ajf-uT60R1vc/edit?usp=sharing
-- there are LOTS of further links to interesting videos in there as well, that I didn't use on the night so worth a scan through.
Any further questions, feel free to ask in comments on here
This is a presentation on Black Holes.
This covers following data about Black Hole->
>>What is Black Hole.
>>History.
>>Parts of Black Hole.
>>Classification.
>>Closest Black Hole.
>>Largest Black Hole.
search on NASA site also go through the latest news related to black holes before presenting your seminar.
many queries are asked related to black holes.
present the astronomical data's for Good delivery of seminar.In the 18th century John Michell and Pierre-Simon Laplace first mentioned about the objects with a huge gravitation, from which even light cannot escape.
In 1915 Albert Einstein developed the theory of general relativity.
Karl Schwarzschild finds black holes as a solution to Einstein’s equations (1916)
Robert Oppenheimer and Hartland Snyder predict that massive stars can collapse into black holes (1939)
A black hole is a region of space that has so much mass concentrated in it that there is no way for a nearby object to escape its gravitational pull.”
Black holes are exotic structures whose gravitational fields are so powerful that they trap everything, even light. They were first postulated by Albert Einstein's theory of general relativity.”
This can happen when a star is dying.
Though they are black they are invisible to us.
The density of a black hole is so great it would be like taking the whole Earth and crushing into a volume smaller than a 1” marble!.
Stellar-mass: 3 to 20 times the mass of our Sun
Supermassive: Black holes with millions to billions of times the mass of our Sun
Mid-mass: In between stellar-mass and supermassive.
Presented at Hofstra University on 3/9/12 in the Leo Guthart Cultural Center Theater. Topics discussed included the evolution of marketing, advertising, and how to best use social media for personal branding use.
Start-up Chile Marketing & Advertising Tribe session on Data Analysis tools for startups. Written by Pedro Villalobos (Lagiar.com), Felipe del Sol (Admetricks.com), Liane Siebenhaar (Mewe.co). This is a selection of tools you can use to shape your pitch and product. If you have any questions, don't hesitate to contact us.
10 Steps of Project Management in Digital Agencies Alemsah Ozturk
This is part of our ( 41? 29! ) agency's culture series. Basicly this series of documents helps our teams learn the foundation of agency culture, basic rules to do their work. We are all about sharing the data & know how, so here we are ;)
Journey Through the Cosmos: Exploring Black Holes & Dr. Stephen Hawking's Leg...TUHIN SAHA
Title: Journey Through the Cosmos: Exploring Black Holes & Dr. Stephen Hawking's Legacy
Embark on a captivating journey through the depths of space and the brilliant mind of one of history's most renowned scientists, Dr. Stephen Hawking. In this enlightening presentation, we delve into the enigmatic phenomenon of Black Holes, their mysterious nature, and the groundbreaking discoveries that have shaped our understanding of the universe.
Unlock the secrets of these celestial wonders as we explore topics such as the fundamental question: What is a Black Hole? Delve into the gripping tale of their discovery and unravel the intricate process of their formation. From the mind-bending structure of Black Holes to the various types that exist across the cosmos, each slide unveils a new layer of cosmic intrigue.
But what happens if someone were to venture too close, falling into the gravitational abyss of a Black Hole? Discover the scientific speculation and theories that surround this captivating scenario, offering insight into the ultimate fate of such an intrepid explorer.
Moreover, journey through the extraordinary life and groundbreaking research of Dr. Stephen Hawking, a visionary whose contributions to theoretical physics revolutionized our understanding of the cosmos. Explore the trials and triumphs of his remarkable journey, from his early years to his groundbreaking work on Black Holes and beyond.
2. Introduction
History of Ideas about Black Holes
Formation
Characteristics of BH
Growth of BH
Size and Amount
Conclusion
3. - Termin “black hole” was introduced by Jonhn Wheeler
in 1967.
- Black hole - a region in the space where the
gravitational pull is so strong that neither substance
nor light can leave this area.
- Around a black hole there is a surface called an event
horizon that marks the point of no return.
4. In the 18th century John Michell and Pierre-Simon
Laplace first mentioned about the objects with a huge
gravitation, from which even light cannot escape.
In 1915 Albert Einstein developed the theory of
general relativity.
Karl Schwarzschild finds black holes as a solution
to Einstein’s equations (1916)
Robert Oppenheimer and Hartland Snyder
predict that massive stars can collapse into black
holes (1939)
5. There are so many theories about formation
The most obvious way of black hole - the core collapse
of massive stars at least with the size of three solar
masses. M= 1.989 × 10^30 kg. When the stars reaches
its end of life, gets crushed under its own gravity,
leaving behind a black hole.
When a gigantic star reaches the final stage of its life
and is about to go supernova, it spends all the nuclear
fuel by then. So it stops burning and heating up and
cannot create the nuclear energy required to feed the
star.
6.
7. Although black holes come in a variety of masses and
sizes, their structures are all alike. A black hole's entire
mass is concentrated in an almost infinitely small and
dense point called a singularity. This point is
surrounded by the event horizon . And a rotating
black hole is surrounded by the ergosphere, a region in
which the black hole drags space itself.
8.
9.
10. Once a black hole has formed, it can continue to grow
by absorbing additional matter. Any black hole will
continually absorb gas and interstellar dust from its
direct surroundings and omnipresent cosmic
background radiation.
Another possibility is for a black hole to merge with
other objects such as stars or even other black holes
11. There is no limit to how large a black hole can be.
However, the largest black holes we think are in
existence are at the centers of many galaxies, and have
masses equivalent to about a billion suns (i.e., a billion
solar masses). Their radii would be a considerable
fraction of the radius of our solar system.
The size of a black hole is defined by its mass. For a
given mass, there is a length called the Schwarzschild
radius, which is proportional to the mass.
12. There are so many black holes in the Universe that it is
impossible to count them.
The Milky Way galaxy contains some 100 billion stars.
Roughly one out of every thousand stars that form is
massive enough to become a black hole. The nearest one is
some 1,600 light years from Earth. (1 ly=2.9 x 10^13 m)
The most massive known black hole in the universe has
been discovered on 10 January 2008 by David Shiga.
The black hole is about six times as massive as the previous
record holder and in fact weighs as much as a small galaxy.
13. Из Вселенной во Вселенную
http://modcos.com/articles.php?id=44
Черная дыра существует?
http://www.ng.ru/science/2009-01-
28/9_blackhole.html
Black Hole
http://en.wikipedia.org/wiki/Black_hole#General_rela
tivity