How the world was created
how human kind was created on earth
how galaxy was created
how black hole was created
what are the theories of Stephen Hawking
Dear Student,
1. When the solar system settled into its current layout about 4.5 billion years ago, Earth formed when gravity pulled swirling gas and dust in to become the third planet from the Sun. Because of this gravitational pull of the Sun, Earth got converted into a planet with a central core, a rocky mantle, and a solid crust.
2. The first human ancestors appeared between five million and seven million years ago when some apelike creatures in Africa began to walk habitually on two legs. They were flaking crude stone tools by 2.5 million years ago. Then some of them spread from Africa into Asia and Europe after two million years ago.
3. After the Big Bang, space was made up almost entirely of hydrogen and helium. Because of this gravity pull dust and gas combined together to form individual stars, and those stars drew closer together into collections that ultimately became galaxies.
4. Black holes are formed when the center of a very massive star collapses in upon itself. This collapse also causes a supernova, or an exploding star, that blasts part of the star into space.
5. Various theories given by Stephen Hawking are:-
1. When the solar system settled into its current layout about 4.5 billion years ago, Earth formed when gravity pulled swirling gas and dust in to become the third planet from the Sun. Because of this gravitational pull of the Sun, Earth got converted into a planet with a central core, a rocky mantle, and a solid crust.
2. The first human ancestors appeared between five million and seven million years ago when some apelike creatures in Africa began to walk habitually on two legs. They were flaking crude stone tools by 2.5 million years ago. Then some of them spread from Africa into Asia and Europe after two million years ago.
3. After the Big Bang, space was made up almost entirely of hydrogen and helium. Because of this gravity pull dust and gas combined together to form individual stars, and those stars drew closer together into collections that ultimately became galaxies.
4. Black holes are formed when the center of a very massive star collapses in upon itself. This collapse also causes a supernova, or an exploding star, that blasts part of the star into space.
5. Various theories given by Stephen Hawking are:-
- He predicted that black holes emit radiation, called Hawking radiation, and also gave proof that the black holes varied in size according to the radiation of energy.
- He with Brandon Carter and James Bardeen discovered the laws of the mechanics of black holes. According to the first of these laws, known as Hawking area theorem, the black hole never gets smaller in terms of total surface area.
- Stephen Hawking states that once a star dies, its entire mass collapses into infinite density or singularity at a single point, leading to the black hole formation.
- He also presented a theory that before the explosion of the Big Bang, time was non-existent.
- He also presented a theory in 2006 that the universe consisted of several initial conditions rather than having one unique initial state.