However the Big Bang theory had some competition…
... The Big Bang Theory To explain Hubble’s extraordinary discoveries about our expanding universe, astronomers came up with the Big Bang Theory. The Big Bang theory states that the whole universe started from a single tiny point that expanded rapidly in an explosion about 13 Billion years ago and is s ...
... The Big Bang Theory To explain Hubble’s extraordinary discoveries about our expanding universe, astronomers came up with the Big Bang Theory. The Big Bang theory states that the whole universe started from a single tiny point that expanded rapidly in an explosion about 13 Billion years ago and is s ...
The Universe
... No one knows the exact size of the Universe, because we cannot see the edge – if there is one. All we do know is that the visible Universe is at least 93 billion light years across. (A light year is the distance light travels in one year – about 9 trillion km.) The Universe has not always been the ...
... No one knows the exact size of the Universe, because we cannot see the edge – if there is one. All we do know is that the visible Universe is at least 93 billion light years across. (A light year is the distance light travels in one year – about 9 trillion km.) The Universe has not always been the ...
Our Universe is big, beautiful… and mostly
... Although dark matter is invisible, astronomers can work out where it is in space from the effect that it has on the things around it – like seeing a sofa cushion being pushed down by an invisible man. In this picture, anywhere containing matter – both visible and invisible stuff – has been coloured in ...
... Although dark matter is invisible, astronomers can work out where it is in space from the effect that it has on the things around it – like seeing a sofa cushion being pushed down by an invisible man. In this picture, anywhere containing matter – both visible and invisible stuff – has been coloured in ...
Powerpoint
... C. Inflationary Theory - predicts that there was a sudden expansion when the universe was very young, more extreme than predicted by the big bang theory! • Considered to be a “revised” Big Bang theory • The universe expanded and cooled until about 10-35 second after the big bang when it became so ...
... C. Inflationary Theory - predicts that there was a sudden expansion when the universe was very young, more extreme than predicted by the big bang theory! • Considered to be a “revised” Big Bang theory • The universe expanded and cooled until about 10-35 second after the big bang when it became so ...
How and when did the universe begin
... primitive matter/energy exploded. Within seconds the fireball ejected matter/energy at velocities approaching the speed of light. Where in the sky each galaxy lay didn't matter—all were redshifted. Some galaxies showed just a slight redshift. An Expanding Universe So if all the galaxies are moving a ...
... primitive matter/energy exploded. Within seconds the fireball ejected matter/energy at velocities approaching the speed of light. Where in the sky each galaxy lay didn't matter—all were redshifted. Some galaxies showed just a slight redshift. An Expanding Universe So if all the galaxies are moving a ...
A Sense of Time
... that the Universe is: o Enormous o Has existed for crazy-long periods of time o We are not the center of the Universe Understanding has increased at breathtaking pace over the last 30 years o Observational astronomy at wavelengths other than visible light (RadioFrequency, X-Ray, Gamma-Ray, Ultravi ...
... that the Universe is: o Enormous o Has existed for crazy-long periods of time o We are not the center of the Universe Understanding has increased at breathtaking pace over the last 30 years o Observational astronomy at wavelengths other than visible light (RadioFrequency, X-Ray, Gamma-Ray, Ultravi ...
THE BIG BANG
... universe was 100,000 years old. At that time, 1,000 times smaller than it is today. When we look at photons separated by 3^o in the sky, those photons came from points that were separated by far greater distance than light any signal could have traveled between at that time in the history of the uni ...
... universe was 100,000 years old. At that time, 1,000 times smaller than it is today. When we look at photons separated by 3^o in the sky, those photons came from points that were separated by far greater distance than light any signal could have traveled between at that time in the history of the uni ...
The Big Bang Theory
... Orion Nebula - http://stardate.utexas.edu/resources/ssguide/planet_form.html ...
... Orion Nebula - http://stardate.utexas.edu/resources/ssguide/planet_form.html ...
notes_chapter1 - Auburn University
... Light from distant galaxies appeared “red shifted” In 1929, Hubble recognized this as a Doppler shift. He concluded that galaxies were moving away rapidly. No galaxies were found to be moving toward Earth. ...
... Light from distant galaxies appeared “red shifted” In 1929, Hubble recognized this as a Doppler shift. He concluded that galaxies were moving away rapidly. No galaxies were found to be moving toward Earth. ...
The Life of the Universe - University of Minnesota
... • Critical density – the density required to balance gravitational attraction and expansion • Dark energy – a repulsive force opposite of gravity ...
... • Critical density – the density required to balance gravitational attraction and expansion • Dark energy – a repulsive force opposite of gravity ...
COSMOLOGY A FLAT EARTH GEOCENTRIC MODEL or the
... The structure and chemical content of astronomical objects provides valuable information about what the universe's conditions must have been like long ago in order to account for currently observed elemental ratios. ...
... The structure and chemical content of astronomical objects provides valuable information about what the universe's conditions must have been like long ago in order to account for currently observed elemental ratios. ...
Study Notes for Integrated Science Astronomy Unit These notes will
... In this part of the unit we learned about how we scientifically explain how our universe has come to be. We discussed from the beginning at singularity to the point at which the first stars began to form. The Big Bang Theory came about by scientists and observers realizing that our universe is expan ...
... In this part of the unit we learned about how we scientifically explain how our universe has come to be. We discussed from the beginning at singularity to the point at which the first stars began to form. The Big Bang Theory came about by scientists and observers realizing that our universe is expan ...
Origins of the Universe
... us the more it is red shifted • The only explanation for that is if everything is moving away from us. • This means the universe is expanding ...
... us the more it is red shifted • The only explanation for that is if everything is moving away from us. • This means the universe is expanding ...
IOSR Journal of Applied Physics (IOSR-JAP) ISSN: 2278-4861.
... After the super-explosion (The Big-Bang), according to the nebula hypothesis [1], the solar system began as a nebula, an area in the Milky Way Galaxy that was a swirling concentration of cold gas and dust. Due to some perturbation, possibly from the nearby supernova this cloud of gas and dust began ...
... After the super-explosion (The Big-Bang), according to the nebula hypothesis [1], the solar system began as a nebula, an area in the Milky Way Galaxy that was a swirling concentration of cold gas and dust. Due to some perturbation, possibly from the nearby supernova this cloud of gas and dust began ...
The Evolution of the Universe: from Cosmic Soup to Earth
... The universe as we know it today originated from a massive explosion commonly referred to as the “Big Bang.” While this term is probably familiar to many of us, what does it really mean? Did all of the galaxies and solar systems as we know them today emerge preformed during this chaotic period, ...
... The universe as we know it today originated from a massive explosion commonly referred to as the “Big Bang.” While this term is probably familiar to many of us, what does it really mean? Did all of the galaxies and solar systems as we know them today emerge preformed during this chaotic period, ...
Unit8TheUniverse
... A. 13-15 b.y.a. the Universe came into being and began to expand at an incredible rate (Inflation). B. Evidence for the Big Bang: The BBT is not designed to explain the origins of the universe only how it developed. 1). Expanding Universe 2). Background radiation that was predicted and later found. ...
... A. 13-15 b.y.a. the Universe came into being and began to expand at an incredible rate (Inflation). B. Evidence for the Big Bang: The BBT is not designed to explain the origins of the universe only how it developed. 1). Expanding Universe 2). Background radiation that was predicted and later found. ...
THE BIG BANG - Dublin City Schools
... • They use radioactive dating of uranium isotopes! • we know that the oldest isotopes were created (through nuclear reactions in supernovae) about 10 billion years ago. ...
... • They use radioactive dating of uranium isotopes! • we know that the oldest isotopes were created (through nuclear reactions in supernovae) about 10 billion years ago. ...
PES 106 – General Astronomy II – Final Study Guide
... Bring a 100-answer ScanTron sheet Expect about 90 questions on the exam ...
... Bring a 100-answer ScanTron sheet Expect about 90 questions on the exam ...
PPT Slides
... The Big Bang • The Universe as we know it began 13.7 billion years ago in an explosion so powerful that space itself was propelled outwards. • Even atoms could not exist in this hot fireball. • 380,000 years after the bang, H atoms formed • 200 Million years later, the first stars formed How do w ...
... The Big Bang • The Universe as we know it began 13.7 billion years ago in an explosion so powerful that space itself was propelled outwards. • Even atoms could not exist in this hot fireball. • 380,000 years after the bang, H atoms formed • 200 Million years later, the first stars formed How do w ...
Big Bang
The Big Bang theory is the prevailing cosmological model for the universe from the earliest known periods through its subsequent large-scale evolution. The model accounts for the fact that the universe expanded from a very high density and high temperature state, and offers a comprehensive explanation for a broad range of observed phenomena, including the abundance of light elements, the cosmic microwave background, large scale structure, and Hubble's Law. If the known laws of physics are extrapolated beyond where they are valid, there is a singularity. Modern measurements place this moment at approximately 13.8 billion years ago, which is thus considered the age of the universe. After the initial expansion, the universe cooled sufficiently to allow the formation of subatomic particles, and later simple atoms. Giant clouds of these primordial elements later coalesced through gravity to form stars and galaxies.Since Georges Lemaître first noted, in 1927, that an expanding universe might be traced back in time to an originating single point, scientists have built on his idea of cosmic expansion. While the scientific community was once divided between supporters of two different expanding universe theories, the Big Bang and the Steady State theory, accumulated empirical evidence provides strong support for the former. In 1929, from analysis of galactic redshifts, Edwin Hubble concluded that galaxies are drifting apart, important observational evidence consistent with the hypothesis of an expanding universe. In 1965, the cosmic microwave background radiation was discovered, which was crucial evidence in favor of the Big Bang model, since that theory predicted the existence of background radiation throughout the universe before it was discovered. More recently, measurements of the redshifts of supernovae indicate that the expansion of the universe is accelerating, an observation attributed to dark energy's existence. The known physical laws of nature can be used to calculate the characteristics of the universe in detail back in time to an initial state of extreme density and temperature.