Variable_Stars
Main - Science - Astronomy - Stars - Variable_Stars
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01/05/2009
Zeroing in on Hubble's constant (EurekAlert!)
( Carnegie Institution ) The rate at which the universe is expanding, a value known as the Hubble constant, has been hotly debated for the last 80 years. Now the director of the Carnegie Observatories, Wendy Freedman, will lead a team who will slash the uncertainty of this value to just three percent via the new Carnegie Hubble Program using NASA's space-based Spitzer telescope.
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01/05/2009
Zeroing In On The Hubble Constant (SpaceDaily)
by Staff Writers Pasadena CA (SPX) Jan 06, 2009 In the early part of the 20th Century, Carnegie astronomer Edwin Hubble discovered that the universe is expanding. The rate of expansion is known as the Hubble constant. Its precise value has been hotly debated for all of the 80 intervening years.
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01/05/2009
Zeroing in on Hubble's constant (PhysOrg)
(PhysOrg.com) -- In the early part of the 20th Century, Carnegie astronomer Edwin Hubble discovered that the universe is expanding. The rate of expansion is known as the Hubble constant. Its precise value has been hotly debated for all of the 80 intervening years. The value of the Hubble constant is a key ingredient in determining the age and size of the universe.
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01/03/2009
Twinkle of stars subject of study (BBC News)
A member of an astronomical society is to take a closer look at stars that change brightness.
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12/30/2008
Dec. 30, 1924: Hubble Annnounces Andromeda Is a Galaxy (Wired News)
1924: Astronomer Edwin Hubble announces that the spiral nebula Andromeda is actually a galaxy and that Milky Way is just one of many galaxies in the universe. Before Copernicus and Galileo , humans thought our world was the center of creation. Then (except for a few notable stragglers ) we learned that the sun and planets did not revolve around the Earth, and we discovered that our sun — ...
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12/12/2008
Weekend SkyWatcher's Forecast - December 12-14, 2008 (Universe Today)
"And from the crew of Apollo 8, we close with good night, good luck, a Merry Christmas and God bless all of you - all of you on the good Earth." -Frank Borman from Apollo 8, December 24, 1968 Greetings, fellow SkyWatchers! It's Friiiiiiday and time to start the weekend in a stellar way! [...]
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| American Association of Variable Star Observers - The largest organization for variable stars: provides professional and amateur collaboration, research, and analysis of variable star observations.Astronomical Society of South Australia - ASSA's variable star group. News, FAQ, charts, and software.Astronomy On-Line - Collaborative Project aimed at getting new people involved in variable star observing.Brigham Young University Variable Star Database - Currently contains 311 stars which have been classified as Delta Scutis or Gamma Doradus in some published source.General Catalog of Variable Stars Research Group - Research group working on the GCVS, Sternberg Astronomical Institute, Moscow, Russia. Includes catalogs and publications.Information Bulletin on Variable Stars - The IBVS is a bulletin of Commissions 27 and 42 of the International Astronomical Union, published by Konkoly Observatory, Budapest, Hungary.The Minima of Algol - An article by Alan MacRobert from Sky and Telescope Magazine about the star Algol (Beta Persei) was the first eclipsing variable star ever discovered.A Ritzian Interpretation of Variable Stars - A study on the nature of the speed of light in space using light curves and spectroscopic observations of variable stars as evidence.Skyandtelescope.com - Variable Stars - Observing variable stars.The Top Twelve Naked-Eye Variable Stars - An article by John Isles from Sky and Telescope Magazine.
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