![The Milky Way](http://s1.studyres.com/store/data/015783720_1-89909047c94ae3f0967df4ad60d9d397-300x300.png)
The Milky Way
... • Many galaxies are typically millions or billions of parsecs from our galaxy. • Typical distance units: ...
... • Many galaxies are typically millions or billions of parsecs from our galaxy. • Typical distance units: ...
Scientific Results Summary
... Subaru Telescope continues to expand the boundaries of astronomical knowledge and cosmological understanding. Another busy year of observations brought discoveries of interest to subjects ranging from Solar System bodies to stellar composition and distant dark matter. Subaru continues to lead the pa ...
... Subaru Telescope continues to expand the boundaries of astronomical knowledge and cosmological understanding. Another busy year of observations brought discoveries of interest to subjects ranging from Solar System bodies to stellar composition and distant dark matter. Subaru continues to lead the pa ...
The Hubble Space Telescope - the first 10 years
... distance we can calculate how long it’s been travelling for (I.e., time=distance/velocity). • All galaxies gives us the same answer ! • This is an approximate* age of the Universe, the point in space-time from which all matter originated (*as this ignores any braking and accelerating) ...
... distance we can calculate how long it’s been travelling for (I.e., time=distance/velocity). • All galaxies gives us the same answer ! • This is an approximate* age of the Universe, the point in space-time from which all matter originated (*as this ignores any braking and accelerating) ...
ps700-coll1-hayden
... elements binding into molecules and proceeding with those building block molecules into amino acids, nucleotides which further led to macro molecules such as DNA and proteins. From there “organelles” (Cell homeostasis, internal cell function) form which make up cells which exhibit growth, specialisa ...
... elements binding into molecules and proceeding with those building block molecules into amino acids, nucleotides which further led to macro molecules such as DNA and proteins. From there “organelles” (Cell homeostasis, internal cell function) form which make up cells which exhibit growth, specialisa ...
PDF - Current Science
... is very different from the early universe when all of space was somewhat like the interior of the Sun. How do we know the geometry of the universe we live in? When Alexander Friedmann solved Einstein’s field equations for a homogeneous and isotropic universe, both expanding and collapsing models wer ...
... is very different from the early universe when all of space was somewhat like the interior of the Sun. How do we know the geometry of the universe we live in? When Alexander Friedmann solved Einstein’s field equations for a homogeneous and isotropic universe, both expanding and collapsing models wer ...
New Planet Definition Proposed by IAU
... (3) We recognize Pluto to be a planet by the above scientific definition, as are one or more recently discovered large Trans-Neptunian Objects. In contrast to the classical planets, these objects typically have highly inclined orbits with large eccentricities and orbital periods in excess of 200 yea ...
... (3) We recognize Pluto to be a planet by the above scientific definition, as are one or more recently discovered large Trans-Neptunian Objects. In contrast to the classical planets, these objects typically have highly inclined orbits with large eccentricities and orbital periods in excess of 200 yea ...
Name Section
... Doppler Shift and the Expanding Universe Your instructor will discuss the Doppler shift of light waves from a moving source. a) A stationery light source emits waves of light uniformly in all directions as shown in the diagram. How do the wavelengths of light from the right side of the diagram compa ...
... Doppler Shift and the Expanding Universe Your instructor will discuss the Doppler shift of light waves from a moving source. a) A stationery light source emits waves of light uniformly in all directions as shown in the diagram. How do the wavelengths of light from the right side of the diagram compa ...
First generation stars
... Abstract:The sterile neutrino is a plausible dark matter candidate that emits an X-ray photon via radiative decay. I will present a progress report of our ongoing dedicated search for dark matter using X-ray observations of dwarf spheroidal galaxies. We have set new constraints on sterile neutrino p ...
... Abstract:The sterile neutrino is a plausible dark matter candidate that emits an X-ray photon via radiative decay. I will present a progress report of our ongoing dedicated search for dark matter using X-ray observations of dwarf spheroidal galaxies. We have set new constraints on sterile neutrino p ...
Galaxies - schoolphysics
... two giant plates held face to face with a diameter of a little over 100 000 light years and made up of some hundred thousand million (1011) stars as well as great clouds of gas. (See: 11-14/Astronomy/Text/Milky Way) ...
... two giant plates held face to face with a diameter of a little over 100 000 light years and made up of some hundred thousand million (1011) stars as well as great clouds of gas. (See: 11-14/Astronomy/Text/Milky Way) ...
Review for Midterm—Chapter 1
... related? – How does light behave in different medium? – How does light behave when the light source is moving? ...
... related? – How does light behave in different medium? – How does light behave when the light source is moving? ...
Hubble - schoolphysics
... If we take the maximum velocity of recession (vm) to be that of light (3x108 ms-1) we can work out the maximum possible radius of the observable universe. (R) This can be found by using Hubble's formula: v = HR R = 3x108x3.09x1022/70x103 = 1.33x1026 m This is equal to 1.40x1010 light years or about ...
... If we take the maximum velocity of recession (vm) to be that of light (3x108 ms-1) we can work out the maximum possible radius of the observable universe. (R) This can be found by using Hubble's formula: v = HR R = 3x108x3.09x1022/70x103 = 1.33x1026 m This is equal to 1.40x1010 light years or about ...
Scientists confirm most distant galaxy ever
... spectroscopy, a technique that looks for the chemical signatures of elements. In this case, that element was hydrogen, the main fuel of stars. Researchers reported their findings in the journal Nature. z8_GND_5296 -- no, that's not a typo, or a spam username -- is a window into the past. Because of ...
... spectroscopy, a technique that looks for the chemical signatures of elements. In this case, that element was hydrogen, the main fuel of stars. Researchers reported their findings in the journal Nature. z8_GND_5296 -- no, that's not a typo, or a spam username -- is a window into the past. Because of ...
Are All Things “Connected”?
... galaxies in the entire universe, for example. The only exception is if there has not yet been time for that gravitational force to be initially communicated between the two stars or galaxies, since it is also assumed that this force can travel no faster than the speed of light. (This is similar to t ...
... galaxies in the entire universe, for example. The only exception is if there has not yet been time for that gravitational force to be initially communicated between the two stars or galaxies, since it is also assumed that this force can travel no faster than the speed of light. (This is similar to t ...
Our Cosmos = Holographic 4D
... on the surface to the Now-Manifold. Its speed is expressed as linear-distance/unit of time, i.e. 299,792,458 meters/second. Quantum physics talks about higher-dimensions being curled-up[1] smaller than the Planck-length[2] – and, there is a debate within the physics community whether or not “time” i ...
... on the surface to the Now-Manifold. Its speed is expressed as linear-distance/unit of time, i.e. 299,792,458 meters/second. Quantum physics talks about higher-dimensions being curled-up[1] smaller than the Planck-length[2] – and, there is a debate within the physics community whether or not “time” i ...
Galaxies
... How the Milky Way Formed? • The Milky Way system is a spiral galaxy consisting of over 400 billion stars, plus gas and dust arranged into three general components: – The halo: a roughly spherical distribution which contains the oldest stars in the Galaxy including Globular Clusters; – The nuclear b ...
... How the Milky Way Formed? • The Milky Way system is a spiral galaxy consisting of over 400 billion stars, plus gas and dust arranged into three general components: – The halo: a roughly spherical distribution which contains the oldest stars in the Galaxy including Globular Clusters; – The nuclear b ...
Presentation available here - Lunar and Planetary Institute
... Accelerating Universe From a National Academy of Science Report: “The resulting acceleration of universal expansion is a new development in physics, possibly as important as the landmark discoveries of quantum mechanics and general relativity near the beginning of the 20th century.” ...
... Accelerating Universe From a National Academy of Science Report: “The resulting acceleration of universal expansion is a new development in physics, possibly as important as the landmark discoveries of quantum mechanics and general relativity near the beginning of the 20th century.” ...
Hubble`s Law
... If the universe is indeed infinite, then there should be at least one star at every visible point in the sky lighting it up in all directions. Imagine standing at the center of a very thick forest: there is always a tree in your line of sight, regardless of what direction you are facing. If the univ ...
... If the universe is indeed infinite, then there should be at least one star at every visible point in the sky lighting it up in all directions. Imagine standing at the center of a very thick forest: there is always a tree in your line of sight, regardless of what direction you are facing. If the univ ...
Non-standard cosmology
![](https://commons.wikimedia.org/wiki/Special:FilePath/WMAP2.jpg?width=300)
A non-standard cosmology is any physical cosmological model of the universe that has been, or still is, proposed as an alternative to the Big Bang model of standard physical cosmology. In the history of cosmology, various scientists and researchers have disputed parts or all of the Big Bang due to a rejection or addition of fundamental assumptions needed to develop a theoretical model of the universe. From the 1940s to the 1960s, the astrophysical community was equally divided between supporters of the Big Bang theory and supporters of a rival steady state universe. It was not until advances in observational cosmology in the late 1960s that the Big Bang would eventually become the dominant theory, and today there are few active researchers who dispute it.The term non-standard is applied to any cosmological theory that does not conform to the scientific consensus, but is not used in describing alternative models where no consensus has been reached, and is also used to describe theories that accept a ""big bang"" occurred but differ as to the detailed physics of the origin and evolution of the universe. Because the term depends on the prevailing consensus, the meaning of the term changes over time. For example, hot dark matter would not have been considered non-standard in 1990, but would be in 2010. Conversely, a non-zero cosmological constant resulting in an accelerating universe would have been considered non-standard in 1990, but is part of the standard cosmology in 2010.