Johnny Galecki
Leonard Hofstadter
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Cast
Episode Guide
- 1. Pilot Sep 24, 2007
- Leonard likes new neighbor Penny, but his roommate thinks he is chasing an impossible dream.
- 2. The Big Bran Hypothesis Oct 1, 2007
- Leonard volunteers to sign for a package, hoping to make a good impression on Penny.
- 3. The Fuzzy Boots Corollary Oct 8, 2007
- Unhappy that Penny is seeing someone, Leonard summons the courage to ask another woman out.
Jul 26, 2023 · The Big Bang Theory is the leading explanation for how the universe began. Simply put, it says the universe as we know it started with an infinitely hot and dense single point that inflated and ...
- What is the cosmic microwave background? | Space
Robert Wilson discovered the cosmic microwave background...
- What Triggered the Big Bang? It's Complicated | Space
The Big Bang is not a model of creation, but a theory that...
- What is the cosmic microwave background? | Space
Mar 25, 2024 · It is often portrayed as a fight between the Big Bang theory and the steady-state theory, or even personalized as a battle between Gamow and Hoyle. But this is a misrepresentation.
- Helge Kragh
- Timeline of The Big Bang Theory
- Singularity Epoch
- Inflation Epoch
- Cooling Epoch
- Structure Epoch
- Long-Term Predictions For The Future of The Universe
- History of The Big Bang Theory
- More Resources on The Big Bang Theory
Working backwards from the current state of the Universe, scientists have theorized that it must have originated at a single point of infinite density and finite time that began to expand. After the initial expansion, the theory maintains that Universe cooled sufficiently to allow the formation of subatomic particles, and later simple atoms. Giant ...
Also known as the Planck Epoch(or Planck Era), this was the earliest known period of the Universe. At this time, all matter was condensed on a single point of infinite density and extreme heat. During this period, it is believed that the quantum effects of gravity dominated physical interactions and that no other physical forces were of equal stren...
With the creation of the first fundamental forces of the universe, the Inflation Epoch began, lasting from 10-32 seconds in Planck time to an unknown point. Most cosmological models suggest that the Universe at this point was filled homogeneously with a high-energy density, and that the incredibly high temperatures and pressure gave rise to rapid e...
As the universe continued to decrease in density and temperature, the energy of each particle began to decrease and phase transitions continued until the fundamental forces of physics and elementary particles changed into their present form. Since particle energies would have dropped to values that can be obtained by particle physics experiments, t...
Over the course of the several billion years that followed, the slightly denser regions of the almost uniformly distributed matter of the Universe began to become gravitationally attracted to each other. They therefore grew even denser, forming gas clouds, stars, galaxies, and the other astronomical structures that we regularly observe today. This ...
Hypothesizing that the Universe had a starting point naturally gives rise to questions about a possible end point. If the Universe began as a tiny point of infinite density that started to expand, does that mean it will continue to expand indefinitely? Or will it one day run out of expansive force, and begin retreating inward until all matter crunc...
The earliest indications of the Big Bang occurred as a result of deep-space observations conducted in the early 20th century. In 1912, American astronomer Vesto Slipher conducted a series of observations of spiral galaxies (which were believed to be nebulae) and measured their Doppler Redshift. In almost all cases, the spiral galaxies were observed...
We have many interesting articles about the Big Bang here at Universe Today. For instance, here is What is the Evidence of the Big Bang?, What Came Before the Big Bang?, A New Theory About Of The Universe’s Creation, and What is Cosmic Background Radiation? For more information, check out NASA’s page on the Big Bang Theory. NASA’s WMAP mission webp...
- 4 min
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Nov 23, 2015 · The Big Bang is not a model of creation, but a theory that explains what we see of the universe's long history — without direct evidence, any predictions for time = 0 are more fantastical than ...
Dec 18, 2023 · Credit: BNL. The first suggestion of the Big Bang was in 1912. Astronomer Vesto Slipher “conducted a series of observations of spiral galaxies (which were believed to be nebulae) and measured ...
Dec 18, 2015 · The basics of the theory are fairly simple. In short, the Big Bang hypothesis states that all of the current and past matter in the Universe came into existence at the same time, roughly 13.8 ...
Jun 12, 2019 · The universe began with a bang. Cosmologists have predicted that stars didn't form for another 180 million years.(Image credit: Shutterstock) The Big Bang theory represents cosmologists ' best ...
