Black holes

Black holes

• 1.
  Presented By EdwinMakeu Class: BCA 3, PCTE College Presented to Mr`s Heena Kalra and BCA 3
• 2.
  Contents 1. History OfBlack Holes 2. What Is a Black Hole? 3. How Big Are Black Holes? 4. How Do Black Holes Form? 5. If Black Holes Are “Black,” How Does Scientist Know They Are There? 6. Could A Black Hole Destroy Earth?
• 3.
  History of BlackHoles • In the 18th century geologist John Michell and first mentioned the ideos of objects with a huge gravitation, from which even light cannot escape. • in 1915 Albert Einstein developed the thoery of general relativity • In 2016, scientists finally detects gravitational waves that emitted from two black holes colliding, proving that such things not only exist, but Einstein was right all along.
• 4.
  What Is BlackHole? • Black Hole is a place 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. • Near a black hole, the slowing of the time is extreme. Time stops. And in the center of black hole, Einstein thory predicts that the time is destroyed
• 5.
  How Big AreBlack Holes? 1. Scientis think the smallest black holes are small as a atom. This Black holes are tiny but have a mass of a mountain 2. Steller- is a type of black holes which has mass that can be up to 20 times more than the mass of sun 3. Supermassive- These are largest black holes which have masses that are more than 1 million suns togther
• 6.
  How Do BlackHoles Form? • Black Holes are normally formed when a star dies away • It is believed the many current existing black holes such as the Stellers and Supermassive black holes formed during the time of Supanova when a very big star collapse within itself and blast throughout the space which also leads to the formation of the universe.
• 7.
  Observers see a brighteningof the Star or galaxy Black Hole Intense gravity bends the light ray Light Rays from Star or galaxy
• 8.
  Could A BlackHole Destroy Earth? • Black Holes do not go around space eating stars moons and planets. • Earth will not fall into a black hole because no black hole is close to the sun
• 9.
  Thank you