Tolle Photos Bilder

April 16, 2012 | Bilder

Einige tolle photos Bilder:

One of a Series of Portraits of Miners Waiting to Go to Work on the 4 P.M. to Midnight Shift at the Virginia-Pocahontas Coal Company Mine #4 near Richlands, Virginia 04/1974
photos

Bild von The U.S. National Archives
Original Caption: One of a Series of Portraits of Miners Waiting to Go to Work on the 4 P.M. to Midnight Shift at the Virginia-Pocahontas Coal Company Mine #4 near Richlands, Virginia. The Mines Are Open Around the Clock. Two Shifts Work in Digging and Bringing Out the Coal, the Other Is Involved in Cleanup Operations. The Cleanup Or "Hoot-Owl" Shift Begins at Midnight 04/1974

U.S. National Archives’ Local Identifier: 412-DA-13891

Photographer: Corn, Jack, 1929-

Subjects:
Richlands (Tazewell county, Virginia, United States) inhabited place
Environmental Protection Agency
Project DOCUMERICA

Persistent URL: arcweb.archives.gov/arc/action/ExternalIdSearch?id=556343

Repository: Still Picture Records Section, Special Media Archives Services Division (NWCS-S), National Archives at College Park, 8601 Adelphi Road, College Park, MD, 20740-6001.

For information about ordering reproductions of photographs held by the Still Picture Unit, visit: www.archives.gov/research/order/still-pictures.html

Reproductions may be ordered via an independent vendor. NARA maintains a list of vendors at www.archives.gov/research/order/vendors-photos-maps-dc.html

Access Restrictions: Unrestricted
Use Restrictions: Unrestricted

All Eyes on Oldest Recorded Supernova
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Bild von Smithsonian Institution
Description: This image combines data from four different space telescopes to create a multi-wavelength view of all that remains of the oldest documented example of a supernova, called RCW 86. The Chinese witnessed the event in 185 A.D., documenting a mysterious "guest star" that remained in the sky for eight months. X-ray images from the European Space Agency’s XMM-Newton Observatory and NASA’s Chandra X-ray Observatory are combined to form the blue and green colors in the image. The X-rays show the interstellar gas that has been heated to millions of degrees by the passage of the shock wave from the supernova.

Infrared data from NASA’s Spitzer Space Telescope, as well as NASA’s Wide-Field Infrared Survey Explorer (WISE) are shown in yellow and red, and reveal dust radiating at a temperature of several hundred degrees below zero, warm by comparison to normal dust in our Milky Way galaxy.

By studying the X-ray and infrared data together, astronomers were able to determine that the cause of the explosion witnessed nearly 2,000 years ago was a Type Ia supernova, in which an otherwise-stable white dwarf, or dead star, was pushed beyond the brink of stability when a companion star dumped material onto it. Furthermore, scientists used the data to solve another mystery surrounding the remnant — how it got to be so large in such a short amount of time. By blowing a wind prior to exploding, the white dwarf was able to clear out a huge "cavity," a region of very low-density surrounding the system. The explosion into this cavity was able to expand much faster than it otherwise would have.

This is the first time that this type of cavity has been seen around a white dwarf system prior to explosion. Scientists say the results may have significant implications for theories of white-dwarf binary systems and Type Ia supernovae.

RCW 86 is approximately 8,000 light-years away. At about 85 light-years in diameter, it occupies a region of the sky in the southern constellation of Circinus that is slightly larger than the full moon.

Creator/Photographer: Chandra X-ray Observatory

NASA’s Chandra X-ray Observatory, which was launched and deployed by Space Shuttle Columbia on July 23, 1999, is the most sophisticated X-ray observatory built to date. The mirrors on Chandra are the largest, most precisely shaped and aligned, and smoothest mirrors ever constructed. Chandra is helping scientists better understand the hot, turbulent regions of space and answer fundamental questions about origin, evolution, and destiny of the Universe. The images Chandra makes are twenty-five times sharper than the best previous X-ray telescope. NASA’s Marshall Space Flight Center in Huntsville, Ala., manages the Chandra program for NASA’s Science Mission Directorate in Washington. The Smithsonian Astrophysical Observatory controls Chandra science and flight operations from the Chandra X-ray Center in Cambridge, Massachusetts.

Medium: Chandra telescope x-ray

Date: 2011

Image ID: nhsc2011-09b

Persistent URL: chandra.harvard.edu/photo/2011/rcw86/

Repository: Smithsonian Astrophysical Observatory

Gift line: X-ray: NASA/CXC/SAO & ESA; Infared: NASA/JPL-Caltech/B. Williams (NCSU)

View more collections from the Smithsonian Institution.

Residents by the pool: Miami, Florida
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Bild von State Library and Archives of Florida
Local call number: C017592

Title: Residents by the pool: Miami, Florida

Date: January 1953

Photographer: Charles Barron

Physical descrip: 1 photoprint – b&w – 4 x 5 in.

Series Title: Department of Commerce collection

Repository: State Library and Archives of Florida, 500 S. Bronough St., Tallahassee, FL 32399-0250 USA. Contact: 850.245.6700. Archives@dos.state.fl.us

Persistent URL: www.floridamemory.com/items/show/56786

Visit Florida Memory to learn more about the Tin Can Tourists of the World, founded in Tampa, Florida.

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