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Topic: Timeline of the Universe


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In the News (Mon 20 Nov 17)

  
  Dark energy - Wikipedia, the free encyclopedia
During the late 1990s, observations of type Ia supernovae suggested that the expansion of the universe is accelerating.
These theories both suggest that the density of baryons and cold dark matter in the universe is about 30% the critical density for closure of the universe.
Specifically, when the volume of the universe doubles, the density of dark matter is halved but the density of dark energy is nearly unchanged (it is exactly constant in the case of a cosmological constant).
en.wikipedia.org /wiki/Accelerating_universe   (2587 words)

  
 CONK! Encyclopedia: Cosmic_inflation   (Site not responding. Last check: 2007-11-06)
Cosmic inflation is the idea, first proposed by Alan Guth in 1981, that the nascent universe passed through a phase of exponential expansion (the inflationary epoch) that was driven by a negative pressure vacuum energy density.
Among these are the observed flatness of the universe (the flatness problem), its extraordinary homogeneity on large (non-causally-connected) scales (the horizon problem), and its lack of any observed topological defects (the monopole problem), predicted by many Grand Unified Theories.
Predictions of the standard model of inflation include geometrical flatness of the universe and near scale invariance of the primordial density fluctuations of the universe.
www.conk.com /search/encyclopedia.cgi?q=Cosmic_inflation   (1066 words)

  
 Astronomy - Internet-Encyclopedia.com   (Site not responding. Last check: 2007-11-06)
Cosmology: the study of the universe as a whole and its evolution.
The Bible contains a number of statements on the position of the earth in the universe and the nature of the stars and planets, most of which are poetic rather than literal; see Biblical cosmology.
Timeline of the interstellar medium and intergalactic medium
www.internet-encyclopedia.com /ie/a/as/astronomy.html   (1669 words)

  
 Learn more about Timeline of the Universe in the online encyclopedia.   (Site not responding. Last check: 2007-11-06)
Learn more about Timeline of the Universe in the online encyclopedia.
This is a timeline that attempts to show the best scientific estimates of the age of past events and predictions of the approximate timing of hypothetical future events with cosmological significance.
Problems with estimating the age of the universe
www.onlineencyclopedia.org /t/ti/timeline_of_the_universe.html   (481 words)

  
 The Universe
In the first seconds of time, the early universe expanded and cooled to 100 billion degrees, and protons, neutrons and electrons began to take form.
After 300,000 years, temperatures in the universe had dropped below 3,000 degrees and neutral atoms were formed as electrons combined with the atomic nuclei.
As the early universe developed, the stars were drawn together into large clusters called galaxies.
www.visionlearning.com /library/module_viewer.php?mid=67&l=&c3=   (476 words)

  
 Timeline of the Universe   (Site not responding. Last check: 2007-11-06)
This particular Timeline of the Universe describes the events that have occurred and will occur according to prevailing scientific theory (specifically, the Big Bang theory).
This model of the creation and ultimate fate of the Universe from a modern scientific standpoint is intended to serve as an educational guide.
Once the universe cooled enough for the combination rate of atoms to be greater than the rate of ionization, the electrons and light nuclei formed atoms.
www.worldhistory.com /wiki/T/Timeline-of-the-Universe.htm   (2409 words)

  
 Origins: Timeline of the Universe
The universe appears to be very well populated with the raw materials to manufacture the deoxyribonucleic (DNA) molecule, the blueprint of all life on Earth.
However, the method for ensuring that all of the right components find each other in the right quantities and under the right circumstances has yet to be identified.
The fact that it happened once, and with such prolific consequences, suggests that in the chain of events described here, the opportunity exists for repeated occurrences of life elsewhere in the universe.
origins.jpl.nasa.gov /library/poster/chemistry_old.html   (107 words)

  
 A Spacetime Map of the Universe
For a "closed" Universe, which collapses, the full globe shape applies; for an "open" Universe, one which expands forever, the appropriate shape is that of a widely flaring bell, gradually opening to a nearly flat rim.
Z values for the "closed 300" Universe example will be approximately the same (in the first 15 billion years of its development) as for a Universe which is poised between open and closed, the "critical density" Universe, which is the reason for its inclusion.
Placing the observed galaxies at the edge of the Universe rather than the center of the illustration is the reason why the expansion of the Universe appears to cause the "horizon" problem, whereas in fact the expansion solves the problem.
www.people.cornell.edu /pages/jag8/spacetxt.html   (10426 words)

  
 April 5,1995
The age of the Universe is 8 - 12 billion years based on the Hubble constant and some simple assumptions however, the ages of the oldest stars is inferred to be least 14 - 16 billion years based on observations of globular clusters.
Let me make a comment now, if the age of the Universe is on the order of 10 (or so) billion years then the size of the observable Universe is roughly going to be the distance over which light could travel since the birth of the Universe.
The strong electron-photon interaction means that before 500,000 years, the Universe was opaque to radiation, that is, the Universe was "foggy" in that light would not travel very far before it interacted with matter.
zebu.uoregon.edu /~imamura/209/apr5/apr5.html   (684 words)

  
 Evolution of the Universe -- Timeline   (Site not responding. Last check: 2007-11-06)
Initially hot, dense and smooth; all energy and matter in the early Universe is nearly uniform.
The original uniformity of the universe begins to diversify.
Original universe activity evolves into the gravitational, strong nuclear, and electroweak (later separating into electromagnetic and weak nuclear forces) interactions.
www.uncg.edu /bio/ConBio105/info/timeline2.htm   (229 words)

  
 A Brief History of the Big Bang   (Site not responding. Last check: 2007-11-06)
Until 1998, astronomers thought that the expansion of the universe ought to be slowing.
The universe may still collapse, even with a non-zero cosmological constant at work, so long as the density of matter in space is high enough.
However, the data of 1998 suggests that, because the universe seems to be accelerating in its expansion, in this epoch in any case, the universe will expand forever to become a cold, dark, boring place in the distant future.
ffden-2.phys.uaf.edu /212_fall2003.web.dir/brian_miller/tim.htm   (250 words)

  
 ASP: Cosmic Calendar
In "Cosmic Calendar", students scale the evolution of the universe to a one year calendar, with the Big Bang occuring on the first moment of January 1st.
While there is currently some controversy about the exact numbers, astronomers estimate that the universe began some 12 to 20 billion years ago in the explosion of space, time, matter and energy we call the Big Bang.
Despite the fact that the national debt is even larger, most students have difficulty grasping how large a span of time this is compared to their own lifetimes or to the events they read about in history.
www.astrosociety.org /education/astro/act2/cosmic.html   (836 words)

  
 The Universe
The quantum wavelength of the universe was larger than the size of the universe itself.
In the past year astronomical observations of type Ia supernovas have led to the conclusion that the universe is not only eexpanding and will expand forever, but also that it is accelerating as it expands, with a long- range "antigravity" repulsive force driving its expansion.
So the book-keeping seems to be that about 70% of the energy in the universe is in the vacuum, about 5% is in the form of normal matter (protons, planets, stars,galaxies, etc.), and the remaining 25% is "dark matter", mysterious invisible particles that inhabit the haloes of galaxies.
www.kheper.net /cosmos/universe/universe.htm   (772 words)

  
 ESA - Science - Home - So, how did everything start?
When it is at a temperature of 1000 GeV (about 10 million million degrees), the forces of nature assume their present properties (such as gravity, electromagnetism, and the strong and weak forces) and the 'quarks', the elementary particles that are the building blocks of matter, wander freely.
The Universe is a fifth of its present size.
When the Universe is half its present size, the nuclear reactions inside the stars have already produced most of the chemical elements that are needed to make Earth-like planets.
www.esa.int /esaSC/SEMC6TS1VED_index_2.html   (787 words)

  
 Understanding the Universe - It's Awesome - Cosmic Calendar - DiscoverySchool.com   (Site not responding. Last check: 2007-11-06)
Astronomers calculate that the universe originated about 13 billion years ago in an explosion of space called the big bang.
As the universe expanded and cooled, small particles condensed and formed the elements hydrogen and helium.
The timeline is in billions of years, so we need a magnifying glass to show when events occurred only millions of years ago.
school.discovery.com /schooladventures/universe/itsawesome/cosmiccalendar   (271 words)

  
 TIME.com - End of the Universe   (Site not responding. Last check: 2007-11-06)
The universe undergoes a brief, explosive period of inflation, growing from smaller than an atom to the size of a grapefruit.
Most of the ordinary matter in the universe is locked up in degenerate stellar remnants‹dead stars that have withered into white dwarfs or blown up and collapsed into neutron stars and fl holes.
Occasionally, electrons and positrons meet and form "atoms" larger than the visible universe is today.
www.time.com /time/covers/1101010625/timeline.html   (364 words)

  
 Edgar Governo, Historian of Things That Never Were
The Timeline of the Highlander Universe compiled by I. Marc Carlson is a catch-all chronology which takes information from the series, the movies, the novels, and even the work of other online historians of things that never were in an attempt to fit it all together in a (somewhat) logical sequence.
The Captain Power Timeline, by Rebecca Lovett, is a good guide to events in the series itself, and it has an explanation for the uninitiated of the dating system, but it seems a little bare in general.
The Timeline of the Vampire Chronicles is actually taken from The Vampire Companion by Katherine Ramsland, with the cooperation of Anne Rice.
www.mts.net /~arphaxad/history.html   (10406 words)

  
 Timeline of the Mario Universe
This is one of the harder games to place on the timeline because most of the game takes place in the past, way before Yoshi's Island, so there's not a whole lot to go on for deciding when "the present" was for this game.
At the moment this game would fit right at the end of the timeline, since all the other adventures are somewhat delayed between when they actually happened and when the game was made.
Many are sure to fit in the middle of the timeline, some may fall after Mario Party 4, and who knows, there could even be a backstory of some kind before Yoshi's Island.
www.lemmykoopa.com /lk1-5.html   (6143 words)

  
 Understanding the Universe - DiscoverySchool.com
"Understanding the Universe" introduces your students to important concepts of the Universe: where the Earth fits into the larger picture of the Universe, how vast and far away places are in the Universe, and the prevailing theory about when and how it all began.
Then the "Universe in One Year" puts these dates in a different context, showing the history of the Universe compressed into one year - from the Big Bang on January 1st to Christopher Columbus' voyage one second before midnight.
Review the Timeline of the Universe, which begins with the Big Bang occurring 13 billion years ago, to learn when our galaxy, sun, and Earth formed.
school.discovery.com /schooladventures/universe/tips.html   (1620 words)

  
 Astronomy Timeline
This is a timeline of important events in astronomical history.
Muhammad, founder of the Islamic religion, was born in 570 A.D. in Mecca.
The source of this material is Windows to the Universe, at http://www.windows.ucar.edu/ at the University Corporation for Atmospheric Research (UCAR).
www.windows.ucar.edu /tour/link=/the_universe/uts/timeline.html   (1175 words)

  
 Evolution of the Universe -- Timeline   (Site not responding. Last check: 2007-11-06)
Initial expansion; Universe begins with expansion that has never ceased.
Original universe activity evolves into the gravitational, strong nuclear, and electroweak interactions.
We don't know if our sun is a second or third generation star, or if it has sibling stars that were generated from the same supernova.
www.uncg.edu /bio/ConBio105/timeline2.htm   (152 words)

  
 ISTAT Astronomy: The Universe and Cosmology - Origin and Expansion of the Universe   (Site not responding. Last check: 2007-11-06)
Students learn to scale the history of the universe since the big bang to a one-year calendar, noting where significant events (such as the formation of the Earth or the rise of humans) would fall in that year.
Using transparencies with dots representing galaxy clusters at two different eras of the universe's history, students observe and measure movement of clusters away from particular locations.
Student graph their data, compute a slope, and relate the slope to the age of the universe.
cse.ssl.berkeley.edu /IU/ISTAT/astroSS/universe_origin.html   (724 words)

  
 [No title]   (Site not responding. Last check: 2007-11-06)
Timeline of important events in the evolution of the universe, from the Big Bang to the present.
Discussion of the origin of structure in the universe and its relationship to the cosmic background radiation.
Consortium of parallel computers and supercomputers attempting to model the early history of the universe and formation of galaxies.
cassfos02.ucsd.edu /physics/ph7/ch15.html   (173 words)

  
 HERO Universe Timeline - HERO GAMES Discussion Boards
I am considering making a 'HERO Universe Timeline' so I can keep track of when all of the different events in the HERO System Universe take place, in relation to each other.
Not only are there gaming-type issues (it would almost certainly contain "GM's vault" stuff), but IP issues, and giving away 'secrets' that DOJ would want their customers to pay for, and the like.
We have timelines for specific periods in the books covering those periods, but we haven't worked them into any overall document.
www.herogames.com /forums/showthread.php?t=24207   (401 words)

  
 History of the Universe: The Cosmological Constant   (Site not responding. Last check: 2007-11-06)
A Timeline for the Universe by J. Mohr
The Evolution of the Universe, Scientific American Article on-line.
The history of the universe in 200 words or less by Eric Schulman
cfa-www.harvard.edu /~jcohn/chaut/history_refs.html   (185 words)

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