Some cool blue images:
SNR G54.1+0.3 (A supernova remnant about 16,000 light years from Earth.)

Image by Smithsonian Institution
Description: Chandra’s image of this supernova remnant shows a bright ring of high-energy particles with a central point-like source. This observation enabled scientists to use the giant Arecibo Radio Telescope to search for and locate the pulsar, or neutron star that powers the ring. The ring of particles and two jet-like structures appear to be due to the energetic flow of radiation and particles from the rapidly spinning neutron star rotating 7 times per second. These discoveries will help scientists better understand how neutron stars channel enormous amounts of energy into particles moving near the speed of light.
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: 2002
Persistent URL: http://photography.si.edu/SearchImage.aspx?id=5381
Repository: Smithsonian Astrophysical Observatory
Gift line: NASA/CXC/U.Mass/F.Lu et al.
Accession number: g541
Landscape on the Jackson farm, vicinity of White Plains, Ga. (LOC)

Image by The Library of Congress
Delano, Jack,, photographer.
Landscape on the Jackson farm, vicinity of White Plains, Ga.
1941 June
1 transparency : color.
Notes:
Title from FSA or OWI agency caption.
Transfer from U.S. Office of War Information, 1944.
Subjects:
Farms
United States–Georgia–White Plains
Format: Transparencies–Color
Rights Info: No known restrictions on publication.
Repository: Library of Congress, Prints and Photographs Division, Washington, D.C. 20540 USA, hdl.loc.gov/loc.pnp/pp.print
Part Of: Farm Security Administration – Office of War Information Collection 11671-10 (DLC) 93845501
General information about the FSA/OWI Color Photographs is available at hdl.loc.gov/loc.pnp/pp.fsac
Persistent URL: hdl.loc.gov/loc.pnp/fsac.1a33902
Call Number: LC-USF35-607
Untitled

Image by Smithsonian Institution
Description: Thomas Smillie was the Smithsonian’s first photographer and curator of photography. He and his studio staff were responsible for collecting and duplicating images brought back by scientists and curators traveling on business in other cities throughout the world, many of which often described the structures of other museums.
Creator/Photographer: Thomas Smillie
Birth Date: 1843
Death Date: 1917
Born in Edinburgh, Scotland, in 1843, Thomas William Smillie immigrated to the United States with his family when he five years old. After studying chemistry and medicine at Georgetown University, he took a job as a photographer at the Smithsonian Institution, where he stayed for nearly fifty years until his death in 1917. Smillie’s duties and accomplishments at the Smithsonian were vast: he documented important events and research trips, photographed the museum’s installations and specimens, created reproductions for use as printing illustrations, performed chemical experiments for Smithsonian scientific researchers, and later acted as the head and curator of the photography lab. Smillie’s documentation of each Smithsonian exhibition and installation resulted in an informal record of all of the institution’s art and artifacts. In 1913 Smillie mounted an exhibition on the history of photography to showcase the remarkable advancements that had been made in the field but which he feared had already been forgotten.
Medium: Cyanotype
Culture: American
Date: 1890
Persistent URL: http://photography.si.edu/SearchImage.aspx?t=5&id=2087&q=RU95_Box76_054
Repository: Smithsonian Institution Archives
Collection: Thomas Smillie Collection (Record Unit 95) – Thomas Smillie served as the first official photographer for the Smithsonian Institution from 1870 until his death in 1917. As head of the photography lab as well as its curator, he was responsible for photographing all of the exhibits, objects, and expeditions, leaving an informal record of early Smithsonian collections.
Accession number: RU95_Box76_054