6. Star Colors and the Hertzsprung
... If one could measure the distance to and recessional rate of very distant objects, expansion speed at different epochs in the evolution of the universe, then one might discriminate not only the age of the universe but what kind of universe we live in. What is actually measured is the redshift. The ...
... If one could measure the distance to and recessional rate of very distant objects, expansion speed at different epochs in the evolution of the universe, then one might discriminate not only the age of the universe but what kind of universe we live in. What is actually measured is the redshift. The ...
The Sky is Our Laboratory
... galaxies? 16. How many different types of galaxies are there? • It is called the `bulge’ and it consists of stars, generally fairly old. Most galaxies have bulges.. For instance, elliptical galaxies could be considered to consist entirely of a `bulge’. Most spiral galaxies have bulges. There is a (n ...
... galaxies? 16. How many different types of galaxies are there? • It is called the `bulge’ and it consists of stars, generally fairly old. Most galaxies have bulges.. For instance, elliptical galaxies could be considered to consist entirely of a `bulge’. Most spiral galaxies have bulges. There is a (n ...
Birth, Age and the Future of the Universe
... Theory predicts that 24 percent of all matter was transformed into helium, and it is a triumph for Big Bang theory that one has never found a gas cloud in our Galaxy or other galaxies with less than this amount of helium. Also the observed abundances of deuterium and lithium agree well with theory. ...
... Theory predicts that 24 percent of all matter was transformed into helium, and it is a triumph for Big Bang theory that one has never found a gas cloud in our Galaxy or other galaxies with less than this amount of helium. Also the observed abundances of deuterium and lithium agree well with theory. ...
Cosmo-PST
... (on the sphere!): All points are equal. Alternative: Any point on the surface can be defined as the center of a coordinate system. ...
... (on the sphere!): All points are equal. Alternative: Any point on the surface can be defined as the center of a coordinate system. ...
§1.3#30 Consider the following geometry: Undefined Terms: Points
... Lines: Similarly, a line will also be interpreted as a member of a set L, given by L = {(x, y) ax + by = c} with a, b, and c ∈ {0, 1}, but a and b are not both zero. The operations of addition and multiplication will be computed using arithmetic modulo 2. So, for example, if a = 1 and b = 1 and c = ...
... Lines: Similarly, a line will also be interpreted as a member of a set L, given by L = {(x, y) ax + by = c} with a, b, and c ∈ {0, 1}, but a and b are not both zero. The operations of addition and multiplication will be computed using arithmetic modulo 2. So, for example, if a = 1 and b = 1 and c = ...
Expansion of the Universe
... Time, space and matter all began with the Big Bang. In a fraction of a second, the Universe grew from smaller than a single atom to bigger than a galaxy and it kept on growing at a fantastic rate It is still expanding today After the big bang, the universe expanded quickly (and continues to expa ...
... Time, space and matter all began with the Big Bang. In a fraction of a second, the Universe grew from smaller than a single atom to bigger than a galaxy and it kept on growing at a fantastic rate It is still expanding today After the big bang, the universe expanded quickly (and continues to expa ...
Phys 214. Planets and Life
... The expansion implies the universe was smaller, denser and hotter in the past. When the visible universe was only one hundred millionth its present size, its temperature was much hotter (273 million K) and denser - the hydrogen was completely ionized into free protons and electrons. ...
... The expansion implies the universe was smaller, denser and hotter in the past. When the visible universe was only one hundred millionth its present size, its temperature was much hotter (273 million K) and denser - the hydrogen was completely ionized into free protons and electrons. ...
Axiom Cosmology: A New Direction
... completely, (in universal logic, the substitution principle we could use here) and though it is outside sector P . Prove that P is convex. Interpretations for the theorem: In this proof, we often went further than that, if using a parametric equation, such as the differential equation of the geodesi ...
... completely, (in universal logic, the substitution principle we could use here) and though it is outside sector P . Prove that P is convex. Interpretations for the theorem: In this proof, we often went further than that, if using a parametric equation, such as the differential equation of the geodesi ...
THE DOPPLER EFFECT
... galaxies would have the whole pattern shifted toward the red end, indicating they are moving away from us. ...
... galaxies would have the whole pattern shifted toward the red end, indicating they are moving away from us. ...
The Universe and Galaxies - West Jefferson Local Schools
... - Dark matter – theoretical unseen and undetectable mass that adds to the gravity of a galaxy - Dark energy – theoretical energy that might be causing accelerated expansion of the universe - most things we see in space are _________ - stars - huge balls of hot _________ that emits _________ - stars ...
... - Dark matter – theoretical unseen and undetectable mass that adds to the gravity of a galaxy - Dark energy – theoretical energy that might be causing accelerated expansion of the universe - most things we see in space are _________ - stars - huge balls of hot _________ that emits _________ - stars ...
The Universe and Galaxies - West Jefferson Local Schools
... - Dark matter – theoretical unseen and undetectable mass that adds to the gravity of a galaxy - Dark energy – theoretical energy that might be causing accelerated expansion of the universe - most things we see in space are _________ - stars - huge balls of hot _________ that emits _________ - stars ...
... - Dark matter – theoretical unseen and undetectable mass that adds to the gravity of a galaxy - Dark energy – theoretical energy that might be causing accelerated expansion of the universe - most things we see in space are _________ - stars - huge balls of hot _________ that emits _________ - stars ...
Getting to Know: Evidence for the Big Bang Theory
... Getting to Know: Evidence for the Big Bang Theory The next time you’re outside on a clear night, ...
... Getting to Know: Evidence for the Big Bang Theory The next time you’re outside on a clear night, ...
Size and Scale of the Universe
... much more beyond that, but we cannot see it from this point in spacetime • Note: The matter that we can see glowing shortly after the Big Bang (detected by the light it emitted 13.7 billion years ago) is now about 46 billion light-years away due to the ongoing expansion of the fabric of the Universe ...
... much more beyond that, but we cannot see it from this point in spacetime • Note: The matter that we can see glowing shortly after the Big Bang (detected by the light it emitted 13.7 billion years ago) is now about 46 billion light-years away due to the ongoing expansion of the fabric of the Universe ...
Size and Scale of the Universe
... much more beyond that, but we cannot see it from this point in spacetime • Note: The matter that we can see glowing shortly after the Big Bang (detected by the light it emitted 13.7 billion years ago) is now about 46 billion light-years away due to the ongoing expansion of the fabric of the Universe ...
... much more beyond that, but we cannot see it from this point in spacetime • Note: The matter that we can see glowing shortly after the Big Bang (detected by the light it emitted 13.7 billion years ago) is now about 46 billion light-years away due to the ongoing expansion of the fabric of the Universe ...
new theory of non-expanding universe
... whole universe permeating space is implied. 5.3.1 Observations on Type Ia supernovae For an expanding universe, the rate of expansion is given by the Hubble constant H or the ratio V/D of recession velocities-to-distances for the receding galaxies, V = Zc being estimated by the redshift Z and the di ...
... whole universe permeating space is implied. 5.3.1 Observations on Type Ia supernovae For an expanding universe, the rate of expansion is given by the Hubble constant H or the ratio V/D of recession velocities-to-distances for the receding galaxies, V = Zc being estimated by the redshift Z and the di ...
Are All Things “Connected”?
... they have not yet had time to reach each other. In this case the middle star would move toward the more massive end star, though not as fast as if the less massive star were not there. So we would have a system which would (at least in some respects) have to be considered as a totality even though t ...
... they have not yet had time to reach each other. In this case the middle star would move toward the more massive end star, though not as fast as if the less massive star were not there. So we would have a system which would (at least in some respects) have to be considered as a totality even though t ...
Structure of the Universe
... • Spiral galaxies are shaped like pinwheels. They have a central bulge from which two or more spiral arms extend. • Elliptical galaxies look like spheres or ovals and do not have spiral arms. • Irregular galaxies appear as splotchy, irregularly shaped “blobs.” ...
... • Spiral galaxies are shaped like pinwheels. They have a central bulge from which two or more spiral arms extend. • Elliptical galaxies look like spheres or ovals and do not have spiral arms. • Irregular galaxies appear as splotchy, irregularly shaped “blobs.” ...
ppt document
... 1. Why is most of the sky dark at night? Whether the universe is infinite or not, shouldn’t there be a star along any line of sight? If the dust absorbs the light, then wouldn’t the dust get hot eventually and radiate light? The Steady State theory would have to have some mechanism for removing this ...
... 1. Why is most of the sky dark at night? Whether the universe is infinite or not, shouldn’t there be a star along any line of sight? If the dust absorbs the light, then wouldn’t the dust get hot eventually and radiate light? The Steady State theory would have to have some mechanism for removing this ...
PHYSICS 113 Assignment #9 SOLUTIONS Chapter 17 13. Starting
... clusters all have approximately the same absolute brightness (i.e. luminosity). These methods work up to distances of nearly one Gpc (= 1,000 Mpc). (vii) The distances to the most remote objects in the universe (e.g. quasars) are found by measuring the redshift of those objects and then by convertin ...
... clusters all have approximately the same absolute brightness (i.e. luminosity). These methods work up to distances of nearly one Gpc (= 1,000 Mpc). (vii) The distances to the most remote objects in the universe (e.g. quasars) are found by measuring the redshift of those objects and then by convertin ...
Shape of the universe
The shape of the universe is the local and global geometry of the Universe, in terms of both curvature and topology (though, strictly speaking, the concept goes beyond both). The shape of the universe is related to general relativity which describes how spacetime is curved and bent by mass and energy.There is a distinction between the observable universe and the global universe. The observable universe consists of the part of the universe that can, in principle, be observed due to the finite speed of light and the age of the universe. The observable universe is understood as a sphere around the Earth extending 93 billion light years (8.8 *1026 meters) and would be similar at any observing point (assuming the universe is indeed isotropic, as it appears to be from our vantage point).According to the book Our Mathematical Universe, the shape of the global universe can be explained with three categories: Finite or infinite Flat (no curvature), open (negative curvature) or closed (positive curvature) Connectivity, how the universe is put together, i.e., simply connected space or multiply connected.There are certain logical connections among these properties. For example, a universe with positive curvature is necessarily finite. Although it is usually assumed in the literature that a flat or negatively curved universe is infinite, this need not be the case if the topology is not the trivial one.The exact shape is still a matter of debate in physical cosmology, but experimental data from various, independent sources (WMAP, BOOMERanG and Planck for example) confirm that the observable universe is flat with only a 0.4% margin of error. Theorists have been trying to construct a formal mathematical model of the shape of the universe. In formal terms, this is a 3-manifold model corresponding to the spatial section (in comoving coordinates) of the 4-dimensional space-time of the universe. The model most theorists currently use is the so-called Friedmann–Lemaître–Robertson–Walker (FLRW) model. Arguments have been put forward that the observational data best fit with the conclusion that the shape of the global universe is infinite and flat, but the data are also consistent with other possible shapes, such as the so-called Poincaré dodecahedral space and the Picard horn.