|
|
Blogroll
|
|
Most recent articles |
|
Highlights |
|
States and Economies |
|
World economies: 15 of 50 largest economies are U.S. States: |
|
World States – Table 1 |
|
History and Society |
|
Fourth of July aboard the W.W. II aircraft carrier the U.S.S. Hornet |
|
A. L. Kroeber's The Civilization of California's Far Northwest |
|
The Arab Admiralty – and an Arab naval view of the Crusades |
|
Excerpt from “The Wife of Bath's Prologue” by Geoffrey Chaucer |
|
“Horsey” Vikings: exploring origin of the “Rohirrim” in The Lord of the Rings
|
|
The Battle of Crécy by Winston S. Churchill |
|
Monotheistic Paganism, or just what was it Christianity fought and faced? |
|
Medieval constipation advice for travelers: “A ripe turd is an unbearable burden” |
|
Alexis de Tocqueville's bicentennial: Anticipatory censorship in colonial America |
|
Antiquity vs. Modernity: Alexis de Tocqueville on the mind of the slaveholder vs. soul of America |
|
Federalism, and Alexis de Tocqueville on the origins of American democracy |
|
Science, Technology, Space |
|
Looking in the right direction – towards the future – with regard to global warming |
|
Know Your Neighborhood: from Andromeda to Fermions and Bosons |
|
Magnetars and Pulsars: Science's special section on pulsars |
|
The Geneva-Copenhagen Survey of Sun-like Stars in the Milky Way |
|
Galactic Central: the Black Hole at the Center of the Galaxy |
|
Politics and War |
|
America’s strong arm, wielding the Sword of Iraq, slays the multi-headed Hydra of Al Qaeda |
|
Regional and Personal |
|
Tamara Lynn Scott |
What wailing wight
Calls the watchman of the night?
William Blake
Whirl is king
Aristophanes
“Jumping into hyperspace ain't like dustin' crops, boy.”
Han Solo, another galaxy
|
Blogroll |
|
Grand Central Station |
|
Legal and Economic |
|
History and Society |
|
Science, Technology, Space |
|
Politics and War |
|
Eclectic |
|
Regional |
|
Reciprocal |
© Copyright 2002 – 2009
Michael Edward McNeil
Impearls
Item page — this may be a chapter or subsection of a larger work. Click on link to access entire piece.
Earthdate 2004-04-30
| The Geneva-Copenhagen Survey of Sun-like Stars in the Milky Way |
The journal
B. Nordstrom
et al. have catalogued the precise three-dimensional motions, ages, temperatures and compositions of more than 14,000 stars. The research required roughly 63,000 individual velocity observations spread over 15 years, and includes almost all the Sun-like stars within 150 light years of Earth.The survey reveals that about one third of the stars exist in binary systems, and that current models describing the dynamical heating of disk stars seem unable to match data that relate the ages and velocities of the stars. The team concludes that the history of our galaxy is much more turbulent than previously thought.
1
Labels: astronomy, Sun-like stars
| (Blank last screen) |
|
![[Powered by Blogger]](http://buttons.blogger.com/bloggerbutton1.gif){kind=small}
2002-11-03 2002-11-10 2002-11-17 2002-11-24 2002-12-01 2002-12-08 2002-12-15 2002-12-22 2002-12-29 2003-01-05 2003-01-12 2003-01-19 2003-01-26 2003-02-02 2003-02-16 2003-04-20 2003-04-27 2003-05-04 2003-05-11 2003-06-01 2003-06-15 2003-06-22 2003-06-29 2003-07-13 2003-07-20 2003-08-03 2003-08-10 2003-08-24 2003-08-31 2003-09-07 2003-09-28 2003-10-05 2003-10-26 2003-11-02 2003-11-16 2003-11-23 2003-11-30 2003-12-07 2003-12-14 2003-12-21 2003-12-28 2004-01-04 2004-01-11 2004-01-25 2004-02-01 2004-02-08 2004-02-29 2004-03-07 2004-03-14 2004-03-21 2004-03-28 2004-04-04 2004-04-11 2004-04-18 2004-04-25 2004-05-02 2004-05-16 2004-05-23 2004-05-30 2004-06-06 2004-06-13 2004-06-20 2004-07-11 2004-07-18 2004-07-25 2004-08-22 2004-09-05 2004-10-10 2005-06-12 2005-06-19 2005-06-26 2005-07-03 2005-07-10 2005-07-24 2005-08-07 2005-08-21 2005-08-28 2005-09-04 2005-09-11 2005-09-18 2005-10-02 2005-10-09 2005-10-16 2005-10-30 2005-11-06 2005-11-27 2006-04-02 2006-04-09 2006-07-02 2006-07-23 2006-07-30 2007-01-21 2007-02-04 2007-04-22 2007-05-13 2007-06-17 2007-09-09 2007-09-16 2007-09-23 2007-10-07 2007-10-21 2007-11-04 2009-06-28 2009-07-19 2009-08-23 2009-09-06 2009-09-20 2009-12-13 2011-03-27 2012-01-01 2012-02-05 2012-02-12
0 comments: (End) Post a Comment