Recommended
More Related Content
Similar to BLACK HOLE.pptx
Similar to BLACK HOLE.pptx (16)
Recently uploaded
Recently uploaded (20)
BLACK HOLE.pptx
- 1. BLACK HOLE
- 2. Presented by: Bigyan Uprety Nischal Bhattarai Dinesh Shrestha Sanskar Parajuli Shyammani Dangol
- 3. Table of Content: Introduction of Black Hole Types of Black hole Literature Review Discussion Objective Conclusion
- 4. Introduction A black hole is a cosmic body of extremely intense gravity from which even light cannot escape. Black holes usually cannot be observed directly, but they can be “observed” by the effects of their enormous gravitational fields on nearby matter. Most black holes contain many times the mass of our Sun and the heaviest ones can have millions of solar masses. It can be formed by the death of a massive star. Black holes of Stellar mass from when massive stars collapses at the end of their life cycle. After a Black hole has formed , it can grow by absorbing mass from its surroundings
- 5. Types of Black Hole • STELLAR MASS BLACK HOLE • INTERMEDIATE MASS BLACK HOLE • SUPERMASSIVE BLACK HOLE • PRIMORDIAL BLACK HOLE
- 6. Literature Review 1783: First Clue In an early foreshadowing of the concept of black holes, British scientist John Michell notes that light can’t escape from objects that are extremely massive given their size. 1915: Bending Spacetime Albert Einstein unveils his general theory of relativity, which describes how mass bends spacetime, producing gravity. The theory eventually leads to the realization that matter could be packed into infinitely warped regions of space, surrounded by boundaries called event horizons, from within which nothing can escape — what we call black holes today. 1916: Schwarzschild’s Solution While serving in the German army in World War I, astronomer Karl Schwarzschild publishes a solution to Einstein’s equations for general relativity near a single spherical mass. Singularities in that solution — points where the math results in infinite values — are an early omen of black holes.
- 7. 1939: Stellar collapse J. Robert Oppenheimer and Hartland Snyder describe how what we now call black holes could form as a massive star collapse under the weight of its own gravity. The light from the star would become steadily fainter as it collapses: “The star thus tends to close itself off from any communication with a distant observer; only its gravitational field persists,” they wrote in Physical Review. 1964: Introducing Black Holes This year marks the first known use of the term “black holes” in print, in Science News Letter, the predecessor of Science News. Reporter Ann Ewing noted that scientists used the term in Cleveland at an American Association for the Advancement of Science meeting. The term was later popularized by physicist John Wheeler.
- 8. 1978: Eyes on M87 By studying the motions of stars in the galaxy M87, more than 50 million light-years from Earth, scientists suggest that it contains a supermassive black hole billions of times the mass of the sun. 2008: Early EHT results An early result from the Event Horizon Telescope, which combines data from telescopes across the world, is released. It confirms that a black hole–like object (illustrated here) rests at the center of the Milky Way, and hints at the structure of the material around the black hole.
- 9. 2019: First Picture The Event Horizon Telescope reports taking the first picture of a black hole, using improved equipment and additional telescopes to image the silhouette formed by the event horizon of the supermassive beast within galaxy M87.
- 10. Discussion The outcome of this research have provided a insight into the introduction of black hole and becoming a familiar with the topic. There are several interesting aspects of black holes that can be explored .The present research work has been conducted to study about black hole its types, structure and how it was formed and many other interesting topic. Black hole is a place in space where gravity is so strong that even light or electromagnetic waves can escape. There are billions and trillions of black hole in the universe. There are four types of black hole. Stellar mass which is formed when massive stars end its life and explodes. Intermediate mass form when multiple stellar-mass black holes undergo a series of mergers with one another . Supermassive black holes grow so large through a runaway chain reaction of colliding stars and black holes . And the last one Primordial black holes were formed right after the Big Bang. It is so incredible to believe that in 1783 AD, British Scientist John Michell notes that light can’t escape from objects that are extremely massive given their size. And after more than 200 years we have captured the image of black hole.
- 11. Objective To know briefly about Black Hole. To understand its types. To learn how black holes were discovered and how scientist started to understand about black holes. From the time of nearly 18th century to current time. We have heard of black holes but we have never tried to know how big it is and where is the black hole so to know about the measurement of Black hole we are doing this project. To learn different terms that are used in studying black holes.
- 12. Conclusion Black holes are full of wonder and mystery. They are also somewhat interesting with their When we look into the universe today, we see that pretty much every large galaxy has a super massive black hole in its heart. Even the Milky way has a black hole at its core with a mass of four million times that of the sun. Black Holes are a long way off at least 26,000 light years (260 quadrillion kilometers). Its mass is still very small compared to the 200 billion solar masses of our galaxy. Not much is known about black holes, but science is making new discoveries every day. This is what they are looking at. What happens to space and time near a black hole? What role do black holes play in the unfolding universe? Can we see a black hole being formed? What happens inside a black hole?