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ISP 205: Visions of the Universe
ISP 205: Visions of the Universe

... • Because no galaxies exist at such a great distance. • Galaxies may exist at that distance, but their light would be too faint for our telescopes to see. • Because looking 15 billion light-years away means looking to a time before the universe existed. ...
6.4 What can you see?
6.4 What can you see?

Syllabus - University of Texas Rio Grande Valley
Syllabus - University of Texas Rio Grande Valley

... Era. Electroweak Era. Particle Era. Nucleosynthesis Era. Nuclei Era. Era of Atoms. Era of Galaxies. Cosmic Microwave Background (CMB). Large-scale structure. Inflation (in the Big Bang Theory). Critical Density (of the Universe). You should also be able to: State the four fundamental forces. State t ...
Pistol Star - University of Dayton
Pistol Star - University of Dayton

Chapter 21: Energy and Matter in the Universe
Chapter 21: Energy and Matter in the Universe

... Energy going into the gravitational force would have taken energy away from the photons, presumably distributing this energy among gravitons, the carrier particles for the gravitational force. The less energetic photons would have had a lower average temperature, and the cooling process of the Unive ...
1 - Uplift North Hills Prep
1 - Uplift North Hills Prep

... ● value of density determines whether or not universe will expand forever, or at some point, begin to contract; ● at density less than critical density, universe will expand forever; ● at density greater than critical density, universe will stop expanding and contract; If second and third marks gain ...
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HighRedshiftGalaxies
HighRedshiftGalaxies

... In addition to the scatter arising from extinction (accounted for via individual Balmer emission line decrements), somebody suggests that some fraction of their UV-selected population must be suffering star formation which is erratic in its time history. In such a situation, different diagnostics wi ...
Facilitator`s Guide PDF
Facilitator`s Guide PDF

... 1. Describe and explain how astronomers use luminosity and redshift to measure the distance and speed of celestial objects. 2. Describe, using pictures, graphs and/or words, what astronomers mean by an expanding universe. Describe several different ways that the expansion could change over time (e.g ...
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WK10revisedoneweek

... •Chronologically discuss key discoveries in the history of Astronomy. ...
The Universe and Galaxies - West Jefferson Local Schools
The Universe and Galaxies - West Jefferson Local Schools

... undetectable mass that adds to the gravity of a galaxy - Dark energy – theoretical energy that might be causing accelerated expansion of the universe ...
Week 9A
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... should diminish with distance, as the dashed curve shows. It doesn’t; more than twice the mass of the galaxy would have to be outside the visible part to reproduce the observed curve. ...
Astr 3020 Cosmology Samples for Exam 2 Foundations of Modern
Astr 3020 Cosmology Samples for Exam 2 Foundations of Modern

... To explain the motions of the planets, sun, moon and stars, Eudoxus used a) a single sphere rotating at a uniform rate around the Earth. b) a system of 27 spheres whose axis of rotation are tilted with respect to each other, each rotating at a different rate to produce the daily, annual and retrogra ...
AST1001.ch1
AST1001.ch1

... • Because no galaxies exist at such a great distance. • Galaxies may exist at that distance, but their light would be too faint for our telescopes to see. • Because looking 15 billion light-years away means looking to a time before the universe existed. ...
Test string theory with primordial gravitational wave
Test string theory with primordial gravitational wave

... The Bunch-Davis state only for mode but for mode Note: initial state is not altered by ...
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100 million years after the Big Bang

Light Year
Light Year

... • Study for your test for the next 5 minutes • Write “Test” on your Warm Up log • After the Test: • Finish your time line ...
Looking For Dark Energy On Earth: A New Experiment Using Atom Understand
Looking For Dark Energy On Earth: A New Experiment Using Atom Understand

... × 10-10 joules per cubic meter. It appears to be uniformly distributed on a cosmological scale. Present observations are 75% dark energy 20% dark matter 5% ordinary matter ...
Review Sheet and Study Hints - Tufts Institute of Cosmology
Review Sheet and Study Hints - Tufts Institute of Cosmology

... critical universe (draw how the scale of the universe changes with time).  What is the geometry of space-time in those models? How can we visualize that?  How will we be able to differentiate between these models?  The cosmological constant, Einstein’s blunder, and why it may nevertheless be impo ...
Home | STA Notes
Home | STA Notes

... (lower frequency) than would be observed from the same elements on earth. i.e. Patterns of spectral lines are shifted towards the red end of the visible spectrum. This phenomenon is known as redshift. Redshift is reminiscent of the Doppler Effect (see SUR notes) - but the explanation is somewhat dif ...
NASA`s X-ray Eye on the Universe
NASA`s X-ray Eye on the Universe

Chapter 27 Quasars, Active Galaxies, and Gamma
Chapter 27 Quasars, Active Galaxies, and Gamma

... • Early radio telescopes found radio emission from stars, nebulae, and some galaxies. • There were also point-like, or star-like, radio sources which varied rapidly these are the `quasi-stellar’ radio sources or quasars. • In visible light quasars appear as points, like stars. ...
wk11noQ
wk11noQ

... • Highest temperature and lowest density of the three gaseous phases (hot, tenuous phase of the ISM): T ~ 103 to 106 K; n ~ 10-5 to 10-3 ions/cm3 • Weak degree of concentration to the plane of the Galactic disk: scale height z is a few kpc. Also seen in dense knots known as “HII regions” marking are ...
Slide 1
Slide 1

... universe, its origin, and its future. foundation: Einstein’s general theory of relativity and its theory of gravitation—for in the large-scale structure of the universe, gravity is the dominant force. ...
Are we alone? - School of Physics
Are we alone? - School of Physics

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Non-standard cosmology



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.
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