The Modern Origins Story: From the Big Bang to Habitable Planets
... on an unexceptional galaxy which is one of about 100 billion galaxies. That is the fundamental fact of the universe we inhabit, and it is very good for us to understand that. Carl Sagan ...
... on an unexceptional galaxy which is one of about 100 billion galaxies. That is the fundamental fact of the universe we inhabit, and it is very good for us to understand that. Carl Sagan ...
1 The Big Bang • The Big Bang Theory postulates that the universe
... In 1948 it was suggested that if the Big Bang did happen then it would be the biggest single emission of energy in the universe and there should be a measurable peak wavelength associated with it. The universe has cooled considerably since the Big Bang. It was predicted to be at a current temperatur ...
... In 1948 it was suggested that if the Big Bang did happen then it would be the biggest single emission of energy in the universe and there should be a measurable peak wavelength associated with it. The universe has cooled considerably since the Big Bang. It was predicted to be at a current temperatur ...
Big Bang Theory Scientific origin of the Universe
... How are distances in the universe measured? • Light-year – the distance that light travels in one year going at the speed of light • Speed of light – 300,000 km/second • Speed of light – 186, 000 miles/second • 9.5 trillion km in one year • Closest star (other that sun) is Proxima Centauri is 4.3 l ...
... How are distances in the universe measured? • Light-year – the distance that light travels in one year going at the speed of light • Speed of light – 300,000 km/second • Speed of light – 186, 000 miles/second • 9.5 trillion km in one year • Closest star (other that sun) is Proxima Centauri is 4.3 l ...
CDFS Lecture
... Evidence for the Big Bang • Redshift of galaxies • Microwave background radiation ...
... Evidence for the Big Bang • Redshift of galaxies • Microwave background radiation ...
The universe - Villanova University
... Less and less fuel, core contracts, outer layers expand. “Nova” and planetary nebula, leaving a white dwarf behind. ...
... Less and less fuel, core contracts, outer layers expand. “Nova” and planetary nebula, leaving a white dwarf behind. ...
The Evolution of the Universe: from Cosmic Soup to Earth
... 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, or did we actually just start with a simple mix of elements? To really under4s ...
... 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, or did we actually just start with a simple mix of elements? To really under4s ...
123mt13a
... the earth and the sun are merely possible points of view from which the motions of the celestial bodies may be described. While the Ptolemaic system which represent the planetary motions by combinations of circular motions - could take any point to be fixed, the choice of any particular point requir ...
... the earth and the sun are merely possible points of view from which the motions of the celestial bodies may be described. While the Ptolemaic system which represent the planetary motions by combinations of circular motions - could take any point to be fixed, the choice of any particular point requir ...
Astronomy 101 Section 4
... educational lectures and activities to talk to someone when something isn’t right ...
... educational lectures and activities to talk to someone when something isn’t right ...
Kg m/s2=SI(G) kg2/m2
... (Gh/(2c5))1/2=5.3905x10-44st0 the Planck time, a chronon, smallest time, quanta of time, when! Time is quantitized at this level, so called “third quantitization.” (Gh/(2c3))1/2=1.6160x10-35m10 the Planck length, an extention, smallest length, quanta of distance, where! Space is quantitized at t ...
... (Gh/(2c5))1/2=5.3905x10-44st0 the Planck time, a chronon, smallest time, quanta of time, when! Time is quantitized at this level, so called “third quantitization.” (Gh/(2c3))1/2=1.6160x10-35m10 the Planck length, an extention, smallest length, quanta of distance, where! Space is quantitized at t ...
Our place in the Universe
... Energy. • As the universe expanded, it cooled. This allowed the first subatomic particles to form (protons, neutron, electrons). • The simplest elements were the first to form. Hydrogen and helium. The fuel for STARS! ...
... Energy. • As the universe expanded, it cooled. This allowed the first subatomic particles to form (protons, neutron, electrons). • The simplest elements were the first to form. Hydrogen and helium. The fuel for STARS! ...
THE BIG BANG - Santa Cruz Institute for Particle Physics
... 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 universe – they are ``causally disconnected.” ...
... 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 universe – they are ``causally disconnected.” ...
Ch. 27.3 Star Groups
... One complete rotation in 200 million years. Our sun is about 30,000 light-years from the center. ...
... One complete rotation in 200 million years. Our sun is about 30,000 light-years from the center. ...
Center of the Universe Card Sort
... The sun is the center of the universe. The planets orbit the sun in circular orbits. ...
... The sun is the center of the universe. The planets orbit the sun in circular orbits. ...
Heart of Darkness - Princeton University Press Blog
... Milky Way galaxy and the realm of the nebulae beyond, to the detection of the primordial fluctuations of energy from which all subsequent structure developed, this book explains the physics and the history of how the current model of our universe arose and has passed every test hurled at it by the s ...
... Milky Way galaxy and the realm of the nebulae beyond, to the detection of the primordial fluctuations of energy from which all subsequent structure developed, this book explains the physics and the history of how the current model of our universe arose and has passed every test hurled at it by the s ...
Galaxies and the Universe
... • At 0.5 c, 24% greater • At 0.9 c, 3 x greater • At 0.99 c, 12 x greater • At 0.999 c, 43 x greater • Each extra 9 more than triples the energy • Getting our 1000 ton ship to 0.9 c takes 1.1 x 1023 joules = U.S. energy use for 1100 years ...
... • At 0.5 c, 24% greater • At 0.9 c, 3 x greater • At 0.99 c, 12 x greater • At 0.999 c, 43 x greater • Each extra 9 more than triples the energy • Getting our 1000 ton ship to 0.9 c takes 1.1 x 1023 joules = U.S. energy use for 1100 years ...
Our Universe is big, beautiful… and mostly
... This new picture shows a different group of galaxies that is much bigger than ours, which is called Pandora’s Cluster. The picture shows such a big part of the Universe that each galaxy only looks like a little white scratch on the photo! The galaxies are only a tiny part of what is really inside Pan ...
... This new picture shows a different group of galaxies that is much bigger than ours, which is called Pandora’s Cluster. The picture shows such a big part of the Universe that each galaxy only looks like a little white scratch on the photo! The galaxies are only a tiny part of what is really inside Pan ...
Introduction: Where and When Are We in the Universe?
... o Galaxy – Collection of billions of star systems held together by gravity Our galaxy is the Milky Way galaxy (or “the galaxy”) 100 billion star systems held together by gravity 100 billion stars in it 100,000 light years across Light travels really damned fast – 186,000 miles in a second ...
... o Galaxy – Collection of billions of star systems held together by gravity Our galaxy is the Milky Way galaxy (or “the galaxy”) 100 billion star systems held together by gravity 100 billion stars in it 100,000 light years across Light travels really damned fast – 186,000 miles in a second ...
Astro 10: Introductory Astronomy
... clear thinking. My own “Chapter 0” on the principles of clear thinking and scientific method ...
... clear thinking. My own “Chapter 0” on the principles of clear thinking and scientific method ...
Lecture 1 outline handout
... B. microseconds (1/1,000,000 sec. ) to age of Universe (~14,000,000,000 years) 2. Units of measure A. metric system B. units of mass (M), length (L), time (T) C. converting english to metric (1 km = 0.6 mi; 1 mi = 1.6 km) D. prefixes (kilo, centi, milli, micro . . .) 3. Scientific notation A. short ...
... B. microseconds (1/1,000,000 sec. ) to age of Universe (~14,000,000,000 years) 2. Units of measure A. metric system B. units of mass (M), length (L), time (T) C. converting english to metric (1 km = 0.6 mi; 1 mi = 1.6 km) D. prefixes (kilo, centi, milli, micro . . .) 3. Scientific notation A. short ...
Celestial Objects
... Evidence for the Big Bang a) red shiftshift- shift toward longer red wavelengths of energy showing that an object is moving AWAY from Earth 1) the farther away the galaxy, the greater the red shift 2) almost all galaxies show a red shiftshiftproof that the universe is expanding (Edwin Hubble was th ...
... Evidence for the Big Bang a) red shiftshift- shift toward longer red wavelengths of energy showing that an object is moving AWAY from Earth 1) the farther away the galaxy, the greater the red shift 2) almost all galaxies show a red shiftshiftproof that the universe is expanding (Edwin Hubble was th ...
The Big Bang Theory
... The radiation emitted by an object moving toward an observer is squeezed; its frequency appears to increase and is therefore said to be blueshifted. In contrast, the radiation emitted by an object moving away is stretched or redshifted. Blueshifts and redshifts exhibited by stars, galaxies and gas c ...
... The radiation emitted by an object moving toward an observer is squeezed; its frequency appears to increase and is therefore said to be blueshifted. In contrast, the radiation emitted by an object moving away is stretched or redshifted. Blueshifts and redshifts exhibited by stars, galaxies and gas c ...
The Milky Way Galaxy
... should look essentially the same from any vantage point. No edge and no center! ...
... should look essentially the same from any vantage point. No edge and no center! ...
Flatness problem
The flatness problem (also known as the oldness problem) is a cosmological fine-tuning problem within the Big Bang model of the universe. Such problems arise from the observation that some of the initial conditions of the universe appear to be fine-tuned to very 'special' values, and that a small deviation from these values would have had massive effects on the nature of the universe at the current time.In the case of the flatness problem, the parameter which appears fine-tuned is the density of matter and energy in the universe. This value affects the curvature of space-time, with a very specific critical value being required for a flat universe. The current density of the universe is observed to be very close to this critical value. Since the total density departs rapidly from the critical value over cosmic time, the early universe must have had a density even closer to the critical density, departing from it by one part in 1062 or less. This leads cosmologists to question how the initial density came to be so closely fine-tuned to this 'special' value.The problem was first mentioned by Robert Dicke in 1969. The most commonly accepted solution among cosmologists is cosmic inflation, the idea that the universe went through a brief period of extremely rapid expansion in the first fraction of a second after the Big Bang; along with the monopole problem and the horizon problem, the flatness problem is one of the three primary motivations for inflationary theory.