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The Big Bang Theory
Transcript of The Big Bang Theory
Origins of the theory
Evidence of the Big Bang theory
Hubble Space Telescope picture shows galaxies 2.2 billion light years away, and many more remote galaxies beyond
The universe has been expanding ever since the Big Bang.
The Big Bang Theory
Rather than a gigantic explosion. Think of the Big Bang as an ongoing expansion, sort of like blowing up a balloon very slowly. It keeps getting bigger and all of the balloon expands equally.
Just about 13.7 billion years ago the universe flickered into existence in an event called the Big Bang. All matter was compacted into a very small ball with infinite density and intense heat called a singularity. A singularity is a zone of intense and unbelievable pressure where everything is squished into infinite density. At this time the singularity was extremely hot and at a very dense state and began expanding rapidly. As the universe expanded it became vastly and dramatically cooler.Atoms formed than molecules. Gravity drew the matter into greater and greater clumps eventually bringing into existence the stars,planets, and galaxies so familiar to us today. The majority of atoms that were produced by the Big Bang.
By: Kiana Nesbeth
In the late 20th century, astronomers found that the universe contains enough mass to slow the expansion of space, but not enough to stop it crashing back together. Instead the universe would coast forever, always slowing but never quite reaching a half.
According to the Hubble's law all galaxies are moving away from us and each other. The further the galaxy the faster it is moving away
A Belgian priest named Georges Lemaitre first suggested the Big Bang Theory in the 1920s. When he theorized that the universe began from a single primordial atom. The idea subsequently received a major boost by Edwin Hubble's observation.
The first 3 minutes
The moment of the explosion
The Big Bang created an incredibly hot Universe a fraction of the size of an atom. It immediately started to cool and expand, for a brief moment growing at a tremendous rate, in a process called inflation. In less than a millisecond, the first matter was created but, for thousands of years, the Universe was dominated by radiation.
The first forms of matter created were the tiniest and most basic particles of matter, such as quarks. Scientists today try to recreate what happened by smashing particles in a particle accelerator and studying the tracks. As the Universe cooled, these particles combined to form protons and neutrons, which later joined to form the nuclei of atoms.
Hubble is one of NASA's most successful and long-lasting science missions.The Hubble Space Telescope's launch in 1990 .Among its many discoveries, Hubble has revealed the age of the universe to be about 13 to 14 billion years. Showing how long ago the Big Bang was.
Timeline of the Universe
Astronomers believe that the Big Bang took place 13.7 billion years ago, and that galaxies began to form 1–2 billion years later. Our Solar System was not created until about 4.6 billion years ago, with primitive single-celled life appearing on Earth about 1 billion years later. It was not until around 600 million years ago that an explosion of life occurred, in the Cambrian Period of Earth’s history. The first dinosaurs evolved 230 million years ago, and man’s earliest ancestors just 4 million years ago.
As the Universe expanded and cooled down, some of the elements that we see today were created. The Big Bang theory predicts how much of each element should have been made in the early universe, and what we see in very distant galaxies and old stars is just right
George Lemaitre came up with the term "Big Bang"
For the first 380,000 years or so, the universe was essentially too hot for light to shine.
The Big Bang was the birth of energy.