The Day We Found the Universe
... happily changed to civil reckoning for determining the start of a day. No longer would the astronomical day begin at high noon, a tradition launched in the days of Ptolemy that often led to great bookkeeping confusion. Instead, it now began at midnight, just as it did for everyone else. “It will pro ...
... happily changed to civil reckoning for determining the start of a day. No longer would the astronomical day begin at high noon, a tradition launched in the days of Ptolemy that often led to great bookkeeping confusion. Instead, it now began at midnight, just as it did for everyone else. “It will pro ...
Observational motivation for Dark Matter
... Afterwards, growth depends on sound velocity and amount of non interacting matter On small scales, pressure will bounce back the perturbations, depending on the sound crossing time and time since passing the Jeans scale ...
... Afterwards, growth depends on sound velocity and amount of non interacting matter On small scales, pressure will bounce back the perturbations, depending on the sound crossing time and time since passing the Jeans scale ...
Worlds Beyond The Poles
... His perception’s view extended a million miles and more beyond the mathematical boundaries of a fallaciously assumed “isolated globe” Earth. It penetrated through the sublime celestial domain, where deceptive lights, like flashing eyes of artful courtesans, had for untold centuries beckoned and woo ...
... His perception’s view extended a million miles and more beyond the mathematical boundaries of a fallaciously assumed “isolated globe” Earth. It penetrated through the sublime celestial domain, where deceptive lights, like flashing eyes of artful courtesans, had for untold centuries beckoned and woo ...
Hubble 2006: Science Year in Review
... Cold War, being in many respects a copy of a KH-11 reconnaissance satellite. Hubble is just one of roughly a dozen large telescopes of similar design that have been lofted into orbit—but Hubble was designed to look up, not down. The heart of Hubble is its 2.4-m mirror. While small by the standards o ...
... Cold War, being in many respects a copy of a KH-11 reconnaissance satellite. Hubble is just one of roughly a dozen large telescopes of similar design that have been lofted into orbit—but Hubble was designed to look up, not down. The heart of Hubble is its 2.4-m mirror. While small by the standards o ...
Dark Energy from the Gas of Wormholes
... good leading approximation for calculation of the partition function and corresponds to the standard methods (e.g., Ritza method, etc.). In Section 3 we investigate properties of the two-point Green function. We show that the presence of the gas of virtual wormholes can be described by the topologic ...
... good leading approximation for calculation of the partition function and corresponds to the standard methods (e.g., Ritza method, etc.). In Section 3 we investigate properties of the two-point Green function. We show that the presence of the gas of virtual wormholes can be described by the topologic ...
THE EVOLUTION OF GALAXY NUMBER DENSITY AT Z < 8 AND
... There are a few reasons for why deep imaging programs are not easily able to convert observations to total numbers of galaxies. One of these issues is that all deep observations are incomplete. This is due to limitations in exposure times and depth such that certain galaxies will be detected more re ...
... There are a few reasons for why deep imaging programs are not easily able to convert observations to total numbers of galaxies. One of these issues is that all deep observations are incomplete. This is due to limitations in exposure times and depth such that certain galaxies will be detected more re ...
Astronomy 201 Cosmology
... distance between two points for flat space: straight line • a path that minimizes the distance between two points is called a geodesic • Examples for geodesics – plane: straight line – sphere: great circle ...
... distance between two points for flat space: straight line • a path that minimizes the distance between two points is called a geodesic • Examples for geodesics – plane: straight line – sphere: great circle ...
Inflationary Cosmology
... theories. Unfortunately, this scenario was plagued by its own problems. It works only if the effective potential of the field φ has a very a flat plateau near φ = 0, which is somewhat artificial. In most versions of this scenario the inflaton field has an extremely small coupling constant, so it cou ...
... theories. Unfortunately, this scenario was plagued by its own problems. It works only if the effective potential of the field φ has a very a flat plateau near φ = 0, which is somewhat artificial. In most versions of this scenario the inflaton field has an extremely small coupling constant, so it cou ...
Stars, Galaxies, Superuniverses and the Urantia Book, by Frederick
... "Your world, Urantia, is one of many similar inhabited planets which comprise the local universe of Nebadon. This universe, together with similar creations, makes up the superuniverse of Orvonton, from whose capital, Uversa, our commission hails. Orvonton is one of the seven evolutionary superuniver ...
... "Your world, Urantia, is one of many similar inhabited planets which comprise the local universe of Nebadon. This universe, together with similar creations, makes up the superuniverse of Orvonton, from whose capital, Uversa, our commission hails. Orvonton is one of the seven evolutionary superuniver ...
1 - Philosophy, Theology, History, Science, Big Questions
... with embodied beings that are relevantly similar to humans -- that is, who exist in a world with fixed laws and who can significantly affect each other for good or ill. Thus, whenever I talk about embodied moral agents, this is the type of agent I shall have in mind. 2. The existence of a Life-Permi ...
... with embodied beings that are relevantly similar to humans -- that is, who exist in a world with fixed laws and who can significantly affect each other for good or ill. Thus, whenever I talk about embodied moral agents, this is the type of agent I shall have in mind. 2. The existence of a Life-Permi ...
A Teacher`s Guide to the Universe
... the level of structure the bigger the structure gets. In other words, as you build a building out of bricks the building becomes bigger than the bricks. Cities become even bigger than the buildings that make it up. The size of astronomical building blocks is very large and sometimes becomes difficul ...
... the level of structure the bigger the structure gets. In other words, as you build a building out of bricks the building becomes bigger than the bricks. Cities become even bigger than the buildings that make it up. The size of astronomical building blocks is very large and sometimes becomes difficul ...
Sunday, March 24, 2013
... in the early part of the 20th century. Our understanding of the distant cosmos depends very strongly on an accurate understanding of the distance scale from which many other cosmic parameters depend. The amount of energy we detect at the Earth emitted by an object is dependent on its intrinsic lumin ...
... in the early part of the 20th century. Our understanding of the distant cosmos depends very strongly on an accurate understanding of the distance scale from which many other cosmic parameters depend. The amount of energy we detect at the Earth emitted by an object is dependent on its intrinsic lumin ...
The Cosmological Constant Problem, an Inspiration for New Physics
... classical vacuum state of zero energy, or perhaps better, why is the resulting four-dimensional curvature so small, or why does Nature prefer a flat spacetime? Apparently spacetime is such, that it takes a lot of energy to curve it, while stretching it is (almost) for free, since the cosmological co ...
... classical vacuum state of zero energy, or perhaps better, why is the resulting four-dimensional curvature so small, or why does Nature prefer a flat spacetime? Apparently spacetime is such, that it takes a lot of energy to curve it, while stretching it is (almost) for free, since the cosmological co ...
Periodic Universal Gravitation Resulting in the Phenomenon of Dark
... 3) In the section (0, T 0/2), dr/dt>0 indicates cosmic expansion. When t approaches 0 from right, r≠0, and dr/dt approaches infinity. At this singularity, all the known physical laws fail [6]. When t=T0/2, dr/dt =0, and r is at maximal value, and cosmos expands to the maximum. And the effect of the ...
... 3) In the section (0, T 0/2), dr/dt>0 indicates cosmic expansion. When t approaches 0 from right, r≠0, and dr/dt approaches infinity. At this singularity, all the known physical laws fail [6]. When t=T0/2, dr/dt =0, and r is at maximal value, and cosmos expands to the maximum. And the effect of the ...
Spring 2015 Mercury - Astronomical Society of the Pacific
... A quarter-century and five servicing missions later, Hubble is performing better than ever. But perhaps the most fascinating aspect of Hubble’s history is that it’s making observations that were never envisioned when it was being designed and built. Here’s one example. In the July 1982 Scientific Am ...
... A quarter-century and five servicing missions later, Hubble is performing better than ever. But perhaps the most fascinating aspect of Hubble’s history is that it’s making observations that were never envisioned when it was being designed and built. Here’s one example. In the July 1982 Scientific Am ...
An Expanded View of the Universe
... in which chemical elements, including the building blocks of life, are synthesised and recycled: without stars there would be no life. Accordingly, stellar astrophysics has long been a core activity for astronomers. But much remains to be understood. With higher angular resolution and greater sensit ...
... in which chemical elements, including the building blocks of life, are synthesised and recycled: without stars there would be no life. Accordingly, stellar astrophysics has long been a core activity for astronomers. But much remains to be understood. With higher angular resolution and greater sensit ...
arXiv:astro-ph/9701131v1 18 Jan 1997
... assumption holds. Nevertheless, modern cosmology suggests that physical laws have held constant from the Planck time to the present, i.e., over cosmological decades spanning the range −50 ≤ η ≤ 10, and there is little reason to expect that they will not continue to do so. We also implicitly assume t ...
... assumption holds. Nevertheless, modern cosmology suggests that physical laws have held constant from the Planck time to the present, i.e., over cosmological decades spanning the range −50 ≤ η ≤ 10, and there is little reason to expect that they will not continue to do so. We also implicitly assume t ...
Introduction to Cosmology - Experimental Elementary Particle
... For times much longer than a second, astronomers use the year (yr), defined as the time it takes the Earth to go once around the Sun. One year is approximately equal to 3.2 × 107 s. In cosmological context, a year is frequently an inconveniently short period of time, so cosmologists frequently use g ...
... For times much longer than a second, astronomers use the year (yr), defined as the time it takes the Earth to go once around the Sun. One year is approximately equal to 3.2 × 107 s. In cosmological context, a year is frequently an inconveniently short period of time, so cosmologists frequently use g ...
Planck 2013 results. XXVI. Background geometry and topology of
... models) and non-trivial topologies (e.g., the torus). The simplest models of spacetime are globally isotropic and simply connected. Although both are supported by both local observations and previous CMB observations, without a fundamental theory of the birth of the Universe, observational constrain ...
... models) and non-trivial topologies (e.g., the torus). The simplest models of spacetime are globally isotropic and simply connected. Although both are supported by both local observations and previous CMB observations, without a fundamental theory of the birth of the Universe, observational constrain ...
THE SHAPE OF REALITY?
... is 225°, 45° more than the 180° we would have in a triangle on the flat plane. This result is stranger still, since not only do the angles fail to add up to the comfortable 180° we know and love, but now we see that on a sphere, different triangles have different sums of angles. As always, we must l ...
... is 225°, 45° more than the 180° we would have in a triangle on the flat plane. This result is stranger still, since not only do the angles fail to add up to the comfortable 180° we know and love, but now we see that on a sphere, different triangles have different sums of angles. As always, we must l ...
A new view of galaxy evolution
... a filter just a bit bluer. This is the These galaxies are very bright and thus traditional way to find distant galaxies easy to see because they are undergoing intense and is being used today to find the most distant star formation, a common process in the early galaxies in the universe. universe. H ...
... a filter just a bit bluer. This is the These galaxies are very bright and thus traditional way to find distant galaxies easy to see because they are undergoing intense and is being used today to find the most distant star formation, a common process in the early galaxies in the universe. universe. H ...
David AJ Seargent
... recent discoveries about other planets have uncovered many features and phenomena which may certainly be regarded as “weird” or anomalous in comparison with anything experienced on Earth. The present volume continues this approach. Strange observations are certainly included within its pages, but th ...
... recent discoveries about other planets have uncovered many features and phenomena which may certainly be regarded as “weird” or anomalous in comparison with anything experienced on Earth. The present volume continues this approach. Strange observations are certainly included within its pages, but th ...
Hubble Deep Field Academy -- Overview
... description, the concepts covered, prerequisites, and the target audience. Science Background: Provides information about the science behind the activity. It clarifies important concepts used in the activity and contains a message from the scientist who worked with the team to develop it. Lesson Pla ...
... description, the concepts covered, prerequisites, and the target audience. Science Background: Provides information about the science behind the activity. It clarifies important concepts used in the activity and contains a message from the scientist who worked with the team to develop it. Lesson Pla ...
Galaxies at High Redshift Encyclopedia of Astronomy & Astrophysics eaa.iop.org Mauro Giavalisco
... and bulges of SPIRAL GALAXIES, provided a criterion to identify high-redshift galaxies. The stars that constitute the spheroids are among the oldest observed in the local universe, and currently there is no appreciable ongoing activity of STAR FORMATION in these systems. These facts indicate that th ...
... and bulges of SPIRAL GALAXIES, provided a criterion to identify high-redshift galaxies. The stars that constitute the spheroids are among the oldest observed in the local universe, and currently there is no appreciable ongoing activity of STAR FORMATION in these systems. These facts indicate that th ...
The Animate and the Inanimate
... time but in the reverse order. To assist in imagining this reverse universe, we may remind ourselves that, when we look in a mirror, the imaginary world that we see in that mirror corresponds in every detail to the world we are in, with the exception that one dimension of space occurs in the reverse ...
... time but in the reverse order. To assist in imagining this reverse universe, we may remind ourselves that, when we look in a mirror, the imaginary world that we see in that mirror corresponds in every detail to the world we are in, with the exception that one dimension of space occurs in the reverse ...