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The Gateway to Astronaut Photography of Earth
(NASA Crew Earth Observations)
Astronaut Photography of Earth - Display Record
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IdentificationMission: ISS028 Roll: E Frame: 18218 Mission ID on the Film or image: ISS028
Country or Geographic Name: PACIFIC OCEAN
Features: SPACE SHUTTLE PLASMA PLUME, AIRGLOW, LIMB, STATION HARDWARE
Center Point: Latitude: 4.0 Longitude: -89.5 (Negative numbers indicate south for latitude and west for longitude)
Stereo: (Yes indicates there is an adjacent picture of the same area)
ONC Map ID: JNC Map ID:
CameraCamera Tilt: High Oblique
Camera Focal Length: 24mm
Camera: N5: Nikon D3S
Film: 4256E : 4256 x 2832 pixel CMOS sensor, 36.0mm x 23.9mm, total pixels: 12.87 million, Nikon FX format.
Percentage of Cloud Cover: 50 (26-50)
GMT Date: 20110721 (YYYYMMDD) GMT Time: 094236 (HHMMSS)
Nadir Point Latitude: 1.6, Longitude: -94.7 (Negative numbers indicate south for latitude and west for longitude)
Nadir to Photo Center Direction: East
Sun Azimuth: 63 (Clockwise angle in degrees from north to the sun measured at the nadir point)
Spacecraft Altitude: 205 nautical miles (380 km)
Sun Elevation Angle: -37 (Angle in degrees between the horizon and the sun, measured at the nadir point)
Orbit Number: 625
Like a comet streaking across the atmosphere, the Space Shuttle Atlantis left space for the final time on July 21, 2011, descending to a smooth landing at NASA’s Kennedy Space Center in Florida. This astronaut photograph, taken from the vantage of the International Space Station (ISS), shows the streak of an ionized plasma plume created by the shuttle’s descent through the atmosphere.
At the time of the image, the ISS was positioned northwest of the Galapagos Islands, while Atlantis was roughly 2,200 kilometers (1,367 miles) to the northeast, off the east coast of the Yucatan Peninsula. The maximum angle of the shuttle’s descent was roughly 20 degrees, though it appears much steeper in the photo because of the oblique viewing angle from ISS. Parts of the space station are visible in the upper right corner of the image.
In the background of the image, airglow hovers over the limb of the Earth. Airglow occurs as atoms and molecules high in the atmosphere (above 80 kilometers, or 50 miles altitude) release energy at night after being excited by sunlight (particularly ultraviolet) during the day. Much of the green glow can be attributed to oxygen molecules.
Over the years, the space shuttle program has gathered many images and insights on earth’s space environment—including auroras—and on the planet below:
In the 1980s and early 1990s, NASA embraced a “systems” approach to studying Earth science. Where land- and ocean-based scientists could make observations in great depth from individual points, space-based sensors could examine entire regimes of Earth with a broader but shallower view—the global ocean surface, plant cover over all continents, the composition of the atmosphere both horizontally and vertically. Scientists could ultimately piece together the micro and macro scales for a deeper understanding of how the planet works.
Equipped with a 60-foot-long payload bay, a nimble robotic arm, and two to seven pairs of human hands and eyes (depending on the size of the crew), the Space Shuttle became an orbiting laboratory and observatory for Earth system science. The shuttle could not observe continuously for months to years, as satellites might. But the human touch and the frequent flights did allow some intensive and diverse studies.
Over three decades, the shuttle served as a critical testbed for remote sensing instruments that would eventually fly on satellites. In fact, many of the technologies in NASA’s Earth Observing System made their maiden flights in the back of NASA’s space pick-up truck.
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Recommended Citation: Earth Science and Remote Sensing Unit, NASA-Johnson Space Center. "The Gateway to Astronaut Photography of Earth." .