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A video instructional series on Earth science and astronomy for college and high school classrooms and adult learners; 7 one-hour video programs and coordinated books.

science astronomy

The Clearinghouse was initiated by Dr. Stacy Palen, now at Weber State University, Ogden, Utah. You may direct questions, comments, and/or suggestions to Dr. Ana Larson via e-mail: anamunn -at- uw -dot- edu

science astronomy

"Check the calendar of events for future webcast programs. To receive information on upcoming events and future webcasts, subscribe to What's Up, the National Air and Space Museum e-newsletter."

science space astronomy

"The Photopic Sky Survey is a 5,000 megapixel photograph of the entire night sky stitched together from 37,440 exposures. Large in size and scope, it portrays a world far beyond the one beneath our feet and reveals our familiar Milky Way with unfamiliar clarity. When we look upon this image, we are in fact peering back in time, as much of the light—having traveled such vast distances—predates civilization itself. Seen at a depth thousands of times more faint than the dimmest visible star, tens of millions of other suns appear, still perhaps only a hundredth of one percent thought to exist in our galaxy alone. Our Milky Way galaxy is the dominant feature, its dusty arms sweeping through the frame, punctuated by red clouds of glowing hydrogen. To the lower right are our nearest neighbors, each small galaxies themselves with their own hundreds of millions of stars."

astronomy photography interactive

"Morning civil twilight (civil dawn) begins when the geometric center of the sun is 6° below the horizon and ends at sunrise. Evening civil twilight (civil dusk) begins at sunset and ends when the geometric center of the sun reaches 6° below the horizon. Nautical twilight is the time when the center of the sun is between 6° and 12° below the horizon. In general, nautical twilight ends when navigation via the horizon at sea is no longer possible. Astronomical twilight is the time when the center of the sun is between 12° and 18° below the horizon. From the end of astronomical twilight in the evening to the beginning of astronomical twilight in the morning, the sky (away from urban light pollution) is dark enough for all astronomical observations."

astronomy wikipedia

"On March 19th, a full Moon of rare size and beauty will rise in the east at sunset. It's a super "perigee moon"--the biggest in almost 20 years. "The last full Moon so big and close to Earth occurred in March of 1993," says Geoff Chester of the US Naval Observatory in Washington DC. "I'd say it's worth a look." Full Moons vary in size because of the oval shape of the Moon's orbit. It is an ellipse with one side (perigee) about 50,000 km closer to Earth than the other (apogee): diagram. Nearby perigee moons are about 14% bigger and 30% brighter than lesser moons that occur on the apogee side of the Moon's orbit. "

astronomy moon education

"The small object featured in this exhibition is the oldest surviving Anglo-American star map. It was made in 1780 by Simeon De Witt, a surveyor for George Washington and the Continental army. The map shows the stars visible from De Witt’s post in New Jersey. Drawing such a map, as De Witt himself later said, fostered an appreciation of “the ever shifting scenery of the skies and all the gorgeous drapery of heaven.”"

maps astronomy science

"Welcome to Your Sky, the interactive planetarium of the Web. You can produce maps in the forms described below for any time and date, viewpoint, and observing location. If you enter the orbital elements of an asteroid or comet, Your Sky will compute its current position and plot it on the map. Each map is accompanied by an ephemeris for the Sun, Moon, planets, and any tracked asteroid or comet. A control panel permits customisation of which objects are plotted, limiting magnitudes, colour scheme, image size, and other parameters; each control is linked to its description in the help file. "

science astronomy software

science astronomy

"The United States Naval Observatory (USNO) provides a wide range of astronomical data and products, and serves as the official source of time for the U.S. Department of Defense and a standard of time for the entire United States."

astronomy science military

"The United States Naval Meteorology and Oceanography Command (NMOC) provides critical information from the ocean depths to the most distant reaches of space, meeting needs in the military, scientific, and civilian communities. "

oceanography astronomy military science

To help you explore the far reaches of our universe, we have teamed up with astronomers at some of the largest observatories in the world to bring you a new view of the sky. Using Google Maps this tool provides an exciting way to browse and explore the universe. You can find the positions of the planets and constellations on the sky and even watching the birth of distant galaxies as seen by the Hubble Space Telescope.

google astronomy

"Ground-based Electro-Optical Deep Space Surveillance, or GEODSS, is an optical system that uses telescopes, low-light level TV cameras, and computers. It replaced an older system of six 20 inch (half meter) Baker-Nunn cameras using photographic film.GEODSS tracks objects in deep space, or from about 3,000 mi (4,800 km) out to beyond geosynchronous altitudes. GEODSS requires nighttime and clear weather tracking because of the inherent limitations of an optical system. Each site has three telescopes. The telescopes have a 40-inch (1.02 m) aperture and a two-degree field of view. The telescopes are able to "see" objects 10,000 times dimmer than the human eye can detect. This sensitivity, and sky background during daytime that masks satellites reflected light, dictates that the system operate at night. As with any ground-based optical system, cloud cover and local weather conditions directly influence its effectiveness. GEODSS system can track objects as small as a basketball more than 20,000 miles (30,000 km) in space or a chair at 35,000 miles, and is a vital part of USSTRATCOM's Space Surveillance Network. Distant Molniya orbiting satellites are often detected in elliptical orbits that surpass the moon and back (245,000 miles out). Each GEODSS site tracks approximately 3,000 objects per night out of 9,900 object that are regularly tracked and accounted for. Objects crossing the International Space Station (ISS) orbit within 20 miles will cause the ISS to adjust their orbit to avoid collision. The oldest object tracked is Object #4 (Vanguard 1) launched in 1957."

astronomy surveillance diego_garcia

Drag and zoom the map to find your location. Click anywhere on the map to generate a sunset/sunrise table for that location or click one of the pre-defined locations. Choose your timezone to get times in your local time. All of your settings will be remem

time astronomy information mapping