211 likes | 595 Views
Origin of the Universe. MMSA Physics. Horsehead Nebula. Helix Nebula (Dying star at center). Eye of Hourglass Nebula. Eagle Nebula. "Pillars of Creation" Eagle Nebula. The Universe is EVERYTHING THAT EXISTS to our knowlege! Moons, Planets, Stars, Galaxies, Italian Beef Sandwiches.
E N D
Origin of the Universe MMSA Physics
Eye of Hourglass Nebula Eagle Nebula
The Universe is EVERYTHING THAT EXISTS to our knowlege! Moons, Planets, Stars, Galaxies, Italian Beef Sandwiches. 14 Billion Years Old The observable universe is 5*1023 miles wide. What is the Universe?
How did the universe begin? • Scientists used to think that the universe stays the same as time goes by. • In the 1920's, it was discovered that the universe is expanding. • As of now, the leading theory on the origin of the universe is the Big Bang Theory Einstein discussing the possibility of an expanding universe with Willem de Sitter (1932)
This expansion continues today. The universe is presently 5.5*1023 miles across or 93 billion light years wide. • Light year: the distance light travels in a year. Big Bang Theory (BBT) • BBT says the universe began as a hot, dense ball containing ALL of the matter and energy which presently exists. • 14 billion years ago, universe suddenly expanded rapidly. (a big bang) Andromeda Galaxy, 2.5 million light years from Earth
This expansion continues today. The universe is presently 5.5*1023 miles across or 93 billion light years wide. • Light year: the distance light travels in a year. Big Bang Theory (BBT) • BBT says the universe began as a hot, dense ball containing ALL of the matter and energy which presently exists. • 14 billion years ago, universe suddenly expanded rapidly. (a big bang) Andromeda Galaxy, 2.5 million light years from Earth
I.) Light from stars and other galaxies is Red-Shifted. Evidence for the Big Bang Theory
I.) Light from stars and other galaxies is Red-Shifted. Evidence for the Big Bang Theory
II.) Cosmic Microwave Background Radiation CMBG Evidence for the Big Bang Theory • Accidentally discovered at Bell Telephone Laboratories by these guys in 1965: • Microwaves that uniformly fill the universe. • Caused by wandering photons from the big bang. Arno Penzias and Robert Wilson (1965)
Theories: Heat Death Most widely accepted theory. Disorder reaches a maximum. Big Rip Phantom Dark Energy will tip all matter apart Big Crunch: Big Bang in reverse. Did a Crunch precede Big Bang? Big Bounce: See Big Crunch Multi-verse collisions: Could have been several Big Bangs. How will it end?