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CalSky
"The most complete astronomical observation and information online-calculator on this globe"
Gateway to Astronaut Photography of Earth
Published by NASA, "The Gateway to Astronaut Photography of Earth hosts the best and most complete online collection of astronaut photographs of Earth."
Gazetteer of Planetary Nomenclature
This gazetteer contains detailed information about all names of topographic and albedo features on planets and satellites (and some planetary ring and ring-gap systems) that the International Astronomical Union (IAU) has named and approved from its founding in 1919 through the present time.
Goddard Space Flight Center
"NASA's Goddard Space Flight Center, located in Greenbelt, Md., manages many of the space agency's Earth observation, astronomy and space physics missions."
Jet Propulsion Laboratory
NASA's Jet Propulsion Laboratory is the "lead U.S. center for robotic exploration of the solar system, and conducts major programs in space-based Earth sciences."
Johnson Space Center
Established in 1961 as NASA's primary center for manned spacecraft.
Kennedy Space Center
NASA's John F. Kennedy Space Center is the nation's "gateway to exploring, discovering and understanding our universe."
Lowell Observatory
The mission of Lowell Observatory is to pursue the study of astronomy, especially the study of our solar system and its evolution; to conduct pure research in astronomical phenomena; and to maintain quality public education and outreach programs to bring the results of astronomical research to the general public.
NASA
NASA.gov brings you images, videos and interactive features from the unique perspective of America's space agency.
NASA Apollo Missions
NASA's portal to data on the Apollo lunar missions
NASA Lunar and Planetary Science
NASA's primary deep archive site for planetary and lunar data obtained from spacecraft missions (both NASA and non-NASA), as well as the primary center for distribution of planetary data and images to educators and the general public.
Physical Measurement Laboratory
Physical reference databases are avaiable from NIST, including Elemental Data Index, Periodic Table Atomic Properties, Physical Constants, Atomic Spectroscopy Data, Molecular Spectroscopic Data, Atomic and Molecular Data, X-Ray and Gamma-Ray Data, Radiation Dosimetry Data, Nuclear Physics Data, and Condensed Matter Physics Data.
Sloan Digital Sky Survey
The Sloan Digital Sky Survey has created the most detailed three-dimensional maps of the Universe ever made, with deep multi-color images of one third of the sky, and spectra for more than three million astronomical objects. Learn and explore all phases and surveys—past, present, and future—of the SDSS.
Space Weather Prediction Center
A service of the National Oceanic and Atmospheric Administration "providing space weather alerts and warnings to the nation and the world.
Universe Today
Astronomy related news and information on the web.
Voyager Project
Detailed information on NASA missions to the outer planets and the first spacecraft to reach Uranus and Neptune
