
iss069e008558 (May 3, 2-23) --- The waxing gibbous Moon is pictured from the International Space Station as it orbited 268 miles above the southern Atlantic Ocean.

Waxing gibbous. Visible to the southeast in early evening, up for most of the night. NASA's Lunar Reconnaissance Orbiter (LRO) has been in orbit around the Moon since the summer of 2009. Its laser altimeter (LOLA) and camera (LROC) are recording the rugged, airless lunar terrain in exceptional detail, making it possible to visualize the Moon with unprecedented fidelity. This is especially evident in the long shadows cast near the terminator, or day-night line. The pummeled, craggy landscape thrown into high relief at the terminator would be impossible to recreate in the computer without global terrain maps like those from LRO. To download, learn more about this visualization, or to see what the Moon will look like at any hour in 2015, visit <a href="http://svs.gsfc.nasa.gov/goto?4236" rel="nofollow">svs.gsfc.nasa.gov/goto?4236</a> <b><a href="http://www.nasa.gov/audience/formedia/features/MP_Photo_Guidelines.html" rel="nofollow">NASA image use policy.</a></b> <b><a href="http://www.nasa.gov/centers/goddard/home/index.html" rel="nofollow">NASA Goddard Space Flight Center</a></b> enables NASA’s mission through four scientific endeavors: Earth Science, Heliophysics, Solar System Exploration, and Astrophysics. Goddard plays a leading role in NASA’s accomplishments by contributing compelling scientific knowledge to advance the Agency’s mission. <b>Follow us on <a href="http://twitter.com/NASAGoddardPix" rel="nofollow">Twitter</a></b> <b>Like us on <a href="http://www.facebook.com/pages/Greenbelt-MD/NASA-Goddard/395013845897?ref=tsd" rel="nofollow">Facebook</a></b> <b>Find us on <a href="http://instagram.com/nasagoddard?vm=grid" rel="nofollow">Instagram</a></b>

Waxing gibbous. Visible to the southeast in early evening, up for most of the night. This marks the first time that accurate shadows at this level of detail are possible in such a computer simulation. The shadows are based on the global elevation map being developed from measurements by the Lunar Orbiter Laser Altimeter (LOLA) aboard the Lunar Reconnaissance Orbiter (LRO). LOLA has already taken more than 10 times as many elevation measurements as all previous missions combined. The Moon always keeps the same face to us, but not exactly the same face. Because of the tilt and shape of its orbit, we see the Moon from slightly different angles over the course of a month. When a month is compressed into 12 seconds, as it is in this animation, our changing view of the Moon makes it look like it's wobbling. This wobble is called libration. The word comes from the Latin for "balance scale" (as does the name of the zodiac constellation Libra) and refers to the way such a scale tips up and down on alternating sides. The sub-Earth point gives the amount of libration in longitude and latitude. The sub-Earth point is also the apparent center of the Moon's disk and the location on the Moon where the Earth is directly overhead. The Moon is subject to other motions as well. It appears to roll back and forth around the sub-Earth point. The roll angle is given by the position angle of the axis, which is the angle of the Moon's north pole relative to celestial north. The Moon also approaches and recedes from us, appearing to grow and shrink. The two extremes, called perigee (near) and apogee (far), differ by more than 10%. The most noticed monthly variation in the Moon's appearance is the cycle of phases, caused by the changing angle of the Sun as the Moon orbits the Earth. The cycle begins with the waxing (growing) crescent Moon visible in the west just after sunset. By first quarter, the Moon is high in the sky at sunset and sets around midnight. The full Moon rises at sunset and is high in the sky at midnight. The third quarter Moon is often surprisingly conspicuous in the daylit western sky long after sunrise. Celestial north is up in these images, corresponding to the view from the northern hemisphere. The descriptions of the print resolution stills also assume a northern hemisphere orientation. To adjust for southern hemisphere views, rotate the images 180 degrees, and substitute "north" for "south" in the descriptions. Credit: <a href="http://svs.gsfc.nasa.gov/index.html" rel="nofollow">NASA/Goddard Space Flight Center Scientific Visualization Studio</a> <b><a href="http://www.nasa.gov/centers/goddard/home/index.html" rel="nofollow">NASA Goddard Space Flight Center</a></b> enables NASA’s mission through four scientific endeavors: Earth Science, Heliophysics, Solar System Exploration, and Astrophysics. Goddard plays a leading role in NASA’s accomplishments by contributing compelling scientific knowledge to advance the Agency’s mission. <b>Follow us on <a href="http://twitter.com/NASA_GoddardPix" rel="nofollow">Twitter</a></b> <b>Join us on <a href="http://www.facebook.com/pages/Greenbelt-MD/NASA-Goddard/395013845897?ref=tsd" rel="nofollow">Facebook</a></b> <b>Find us on <a href="http://web.stagram.com/n/nasagoddard/?vm=grid" rel="nofollow">Instagram</a></b>

iss071e092177 (May 19, 2024) -- An illuminated waxing gibbous moon is pictured from the International Space Station as it soared 258 miles above the Indian Ocean.

iss071e184156 (June 14, 2024) -- A waxing gibbous moon is illuminated against the black of space as the International Space Station orbited 262 miles above the Indian Ocean.

iss071e206291 (June 20, 2024) -- A waxing gibbous moon rises over the Indian Ocean as the International Space Station orbited 266 miles above.

iss073e0505414 (Aug. 6, 2025) --- The SpaceX Dragon crew spacecraft that ferried NASA’s Crew-10 mission to the International Space Station is seen docked to the forward port of the Harmony module, as photographed from NASA’s SpaceX Crew-11 Dragon spacecraft attached to Harmony’s space-facing port. Just above Earth’s horizon at center left, a tiny white dot marks the Waxing Gibbous Moon. This image was captured as the orbital outpost soared 259 miles above the Atlantic Ocean.

iss073e0819960 (Oct. 3, 2025) --- The waxing gibbous Moon rises above Earth’s blue atmosphere in this photograph taken from the International Space Station as it orbited 263 miles above a cloudy Atlantic Ocean off the coast of Quebec, Canada.

A special maneuver of NASA Terra spacecraft was performed as it traversed the nightside enabling a backward somersault of the spacecraft, allowing the normally Earth-viewing instruments to look at deep space and the waxing gibbous Moon.

iss062e137200 (April 6, 2020) --- A waxing gibbous Moon is pictured from the International Space Station as it orbited above North America.

iss062e137195 (April 6, 2020) --- A waxing gibbous Moon is pictured from the International Space Station as it orbited above North America.

iss068e014814 (Oct. 7, 2022) --- The waxing gibbous Moon is pictured from the International Space Station as it orbited 264 miles above eastern Canada.

iss068e037043 (Jan. 4, 2022) --- The Waxing Gibbous Moon is pictured from the International Space Station as it orbited 268 miles above the southern Pacific Ocean.

iss064e006423 (Nov. 27, 2020) --- A waxing gibbous moon is pictured from the International Space Station as it orbited northeast of the Bahamas in the Atlantic Ocean.

iss065e133389 (June 21, 2021) --- The waxing gibbous Moon is pictured from the International Space Station as it orbited 261 miles above the Indian Ocean south of India.

iss065e484849 (Oct. 15. 2021) --- The waxing gibbous Moon is pictured from the International Space Station as it orbited 262 miles above the northeastern United States.

iss067e123467 (June 12, 2022) --- The waxing gibbous Moon is photographed above Earth's horizon from the International Space Station as it orbited 261 miles above Turkey.

iss065e484869 (Oct. 16. 2021) --- The waxing gibbous Moon is pictured over Earth's horizon as the International Space Station orbited 262 miles above Tajikistan.

iss065e053289 (May 23, 2021) --- A waxing gibbous Moon is pictured from the International Space Station as it orbited 263 miles above the Pacific Ocean.

iss072e186908 (Nov. 14, 2024) -- A golden waxing gibbous moon is pictured from the International Space Station as it orbited 259 miles above Earth.

iss066e105101 (Dec. 17, 2021) --- The waxing gibbous Moon is pictured from the International Space Station as it orbited 265 miles above the U.S. state of Minnesota.

iss064e026149 (Jan. 26, 2021) --- The waxing gibbous Moon is pictured from the International Space Station as it orbited 261 miles above the South China Sea.

iss068e036313 (Jan. 2, 2023) --- The Waxing Gibbous Moon is pictured from the International Space Station as it orbited 269 miles above the southern Indian Ocean.

iss055e000034 (Feb. 28, 2018) --- A waxing gibbous moon was pictured above the Earth's limb as the International Space Station orbited over the southern Indian Ocean just southwest of the African continent.

iss055e000030 (Feb. 28, 2018) --- A waxing gibbous moon was pictured above the Earth's limb as the International Space Station orbited over the southern Indian Ocean just southwest of the African continent.

iss072e186870 (Nov. 13, 2024) -- A waxing gibbous moon rises over the blue glow of Earth's horizon as the International Space Station orbited 264 miles above the Indian Ocean.

iss067e249811 (Aug. 10, 2022) --- The waxing gibbous Moon is pictured from the International Space Station as it orbited 259 miles above the Pacific Ocean off the coast of north California.

iss065e280824 (Aug. 19, 2021) --- The waxing gibbous Moon (upper right) is pictured from the International Space Station as it orbited 262 miles above the Atlantic Ocean just east of the Lesser Antilles, a group of islands in the Caribbean Sea.

iss068e044225 (Jan. 31, 2023) --- The waxing gibbous Moon is pictured above the Earth's horizon from the International Space Station as it orbited 259 miles above the Gulf of Mexico.

iss064e025547 (Jan. 23, 2021) --- The waxing gibbous Moon is pictured from the International Space Station as it orbited 263 miles above the Pacific Ocean near the island state of Samoa and the U.S. territory of American Samoa. Credit: Roscosmos

iss071e092171 (May 19, 2024) --- The International Space Station's Dextre, the fine-tuned robotic hand, attached to the Canadarm2 robotic arm dominates the frame with the waxing gibbous Moon (at top) in the background and the Indian Ocean 259 miles below.

iss070e096713 (Feb. 20, 2024) --- Earth's atmosphere refracts the light of the waxing gibbous Moon in this photograph from the International Space Station as it orbited 261 miles above the Atlantic Ocean off the coast of the northeastern United States.

iss067e249822 (Aug. 10, 2022) --- The waxing gibbous Moon is pictured above the Earth's horizon from the International Space Station as it orbited 259 miles above the northern Pacific Ocean.

iss069e029091 (July 5, 2023) --- The waxing gibbous Moon is pictured above Earth's horizon in this photograph from the International Space Station as it orbited 261 miles above the Atlantic Ocean off the coast of Namibia.

iss059e000462 (March 16, 2019) --- The waxing gibbous moon is pictured above Earth's limb as the International Space Station was orbiting 266 miles above the South Atlantic Ocean.

iss066e144042 (Feb. 14, 2022) --- The waxing gibbous Moon is pictured on Valentine's Day from the International Space Station as it orbited 261 miles above the Pacific Ocean off the coast of British Columbia, Canada.

iss066e142988 (Feb. 14, 2022) --- The waxing gibbous Moon is pictured on Valentine's Day from the International Space Station as it orbited 261 miles above southwest Kazakhstan near the Caspian Sea.

iss065e005949 (April 26, 2021) --- A waxing gibbous Moon, or near Full Moon, is pictured from the International Space Station as it orbited 267 miles above the southern Indian Ocean.

iss068e014220 (Oct. 6, 2022) --- The SpaceX Dragon Endurance crew ship, carrying four Crew-5 members, approaches the International Space Station with the waxing gibbous Moon pictured in the background. Credit: NASA/Kjell Lindgren

iss068e045017 (Feb. 2, 2023) -- The waxing gibbous Moon is pictured above Earth's horizon from the International Space Station as it orbited 260 miles above eastern China near the Yellow Sea coast.

iss055e000039 (Feb. 28, 2018) --- A waxing gibbous moon was pictured above the Earth's limb as the International Space Station orbited over the southern Indian Ocean just southwest of the African continent.

iss059e000461 (March 16, 2019) --- The waxing gibbous moon is pictured above Earth's limb as the International Space Station was orbiting 266 miles above the South Atlantic Ocean.

iss068e020619 (Nov. 4, 2022) --- The waxing gibbous Moon is pictured from the International Space Station as it orbited 271 miles above the Indian Ocean southwest of Australia's island state of Tasmania.

iss068e014262 (Oct. 6, 2022) --- The SpaceX Dragon Endurance crew ship, carrying four Crew-5 members, approaches the International Space Station with the waxing gibbous Moon pictured in the background. Credit: NASA/Kjell Lindgren

iss063e081151 (Aug. 29, 2020) --- A waxing gibbous moon is pictured above the Earth's horizon as the International Space Station orbited above the Atlantic Ocean off the coast of Brazil.

iss067e249811 (Aug. 10, 2022) --- The waxing gibbous Moon is pictured from the International Space Station as it orbited 258 miles above the Pacific Ocean north of the Hawaiian island chain.

iss064e037041 (Feb. 23, 2021) --- The photograph looks across India, the Himalayas, and into China as the International Space Station orbited 264 miles above. A waxing gibbous Moon is pictured above the Earth's horizon.

iss055e000043 (Feb. 28, 2018) --- A waxing gibbous moon was pictured above the Earth's limb as the International Space Station orbited over the southern Indian Ocean just southwest of the African continent.

iss067e249774 (Aug. 9, 2022) --- The waxing gibbous Moon is pictured from the International Space Station as it orbited 260 miles above the Pacific Ocean south of Alaska's Aleutian Islands.

iss070e097393 (Feb. 21, 2024) --- The waxing gibbous Moon is pictured above the Earth's horizon in this photograph from the International Space Station as it orbited 262 miles above a cloudy Western Europe.

iss059e021191 (April 11, 2019) --- The moon is photographed in its waxing gibbous phase as the International Space Station orbited 256 miles above the North Pacific Ocean south of Alaska's Aleutian Islands.

iss064e016494 (Dec. 29, 2020) --- The waxing gibbous Moon, the phase before it becomes a Full Moon, is pictured from the International Space Station as it orbited 272 miles above the South Atlantic in between the tip of South America and the tip of South Africa.

iss064e026716 (Jan. 26, 2021) --- The waxing gibbous moon is pictured below a portion of the SpaceX Crew Dragon spacecraft docked to the Harmony module's forward international docking adapter. The International Space Station was orbiting 263 miles above Atlanta, Georgia, when this photograph was taken.

iss064e016473 (Dec. 29, 2020) --- The waxing gibbous Moon, the phase before it becomes a Full Moon, is pictured from the International Space Station as it orbited 272 miles above the South Atlantic in between the tip of South America and the tip of South Africa.

iss068e012259 (Oct. 6, 2022) --- The waxing gibbous Moon is pictured above the Earth's horizon as the International Space Station orbited 264 miles above the Netherlands. In the right foreground, is the Japanese robotic arm that supports payload operations outside the Kibo laboratory module.

iss068e020765 (Nov. 6, 2022) --- The waxing gibbous Moon is pictured above Earth's horizon as the International Space Station orbited 271 miles over southern Argentina. Crossing the foreground, is a portion of the Canadarm2 robotic arm provided by the Canadian Space Agency.

iss068e026677 (Dec. 4, 2022) --- The waxing gibbous Moon is pictured above Earth's horizon from the International Space Station as it orbited 261 miles over the northern Pacific Ocean. At the time of this photograph the Orion vehicle on the Artemis I mission was almost 24,000 miles away from the Moon and approximately 222,200 miles from Earth traveling at a speed of 3,076 miles per hour.

ISS040-E-127888 (6 Sept. 2014) --- A close look at this image, photographed by one of the Expedition 40 crew members onboard the International Space Station at 228 nautical miles above Earth, reveals a waxing gibbous moon in center frame. The image was taken as the orbital outpost was flying over the southwest Pacific in the area of New Zealand. The NanoRacks Cubesat deployer, attached to the Japan Aerospace Exploration Agency’s Kibo robotic arm, can be seen in upper right. Soyuz 39 TMA-13M is on Rassvet at right.

iss068e026681 (Dec. 4, 2022) --- The waxing gibbous Moon is pictured above Earth's horizon from the International Space Station as it orbited 261 miles over the northern Pacific Ocean. At the time of this photograph the Orion vehicle on the Artemis I mission was almost 24,000 miles away from the Moon and approximately 222,200 miles from Earth traveling at a speed of 3,076 miles per hour.

iss068e026672 (Dec. 4, 2022) --- The waxing gibbous Moon is pictured above Earth's horizon from the International Space Station as it orbited 261 miles over the northern Pacific Ocean. At the time of this photograph the Orion vehicle on the Artemis I mission was almost 24,000 miles away from the Moon and approximately 222,200 miles from Earth traveling at a speed of 3,076 miles per hour.

ISS038-E-000649 (12 Nov. 2013) --- Although crew members on the International Space Station view literally hundreds of scenes of the moon rising and setting over Earth on each several- month increment, the home planet's natural satellite never ceases to escape the crew's attention and impulse to grab a camera from time to time. Such was the case with this image of a waxing gibbous moon recorded exactly at 00:00:00 GMT, Nov. 12, 2013.

iss068e026673 (Dec. 4, 2022) --- The waxing gibbous Moon is pictured above Earth's horizon from the International Space Station as it orbited 261 miles over the northern Pacific Ocean. At the time of this photograph the Orion vehicle on the Artemis I mission was almost 24,000 miles away from the Moon and approximately 222,200 miles from Earth traveling at a speed of 3,076 miles per hour.

iss068e026678 (Dec. 4, 2022) --- The waxing gibbous Moon is pictured above Earth's horizon from the International Space Station as it orbited 261 miles over the northern Pacific Ocean. At the time of this photograph the Orion vehicle on the Artemis I mission was almost 24,000 miles away from the Moon and approximately 222,200 miles from Earth traveling at a speed of 3,076 miles per hour.

NASA image acquired September 27, 2012 On September 27, 2012, the Visible Infrared Imaging Radiometer Suite (VIIRS) on the Suomi NPP satellite captured this nighttime view of low-lying marine layer clouds along the coast of California. The image was captured by the VIIRS “day-night band,” which detects light in a range of wavelengths from green to near-infrared and uses filtering techniques to observe signals such as gas flares, auroras, wildfires, city lights, and reflected moonlight. An irregularly-shaped patch of high clouds hovers off the coast of California, and moonlight caused the high clouds to cast distinct shadows on the marine layer clouds below. VIIRS acquired the image when the Moon was in its waxing gibbous phase, meaning it was more than half-lit, but less than full. Low clouds pose serious hazards for air and ship traffic, but satellites have had difficulty detecting them in the past. To illustrate this, the second image shows the same scene in thermal infrared, the band that meteorologists generally use to monitor clouds at night. Only high clouds are visible; the low clouds do not show up at all because they are roughly the same temperature as the ground. NASA Earth Observatory image by Jesse Allen and Robert Simmon, using VIIRS Day-Night Band data from the Suomi National Polar-orbiting Partnership. Suomi NPP is the result of a partnership between NASA, the National Oceanic and Atmospheric Administration, and the Department of Defense. Caption by Adam Voiland. Instrument: Suomi NPP - VIIRS Credit: <b><a href="http://www.earthobservatory.nasa.gov/" rel="nofollow"> NASA Earth Observatory</a></b> <b>Click here to view all of the <a href="http://earthobservatory.nasa.gov/Features/NightLights/" rel="nofollow"> Earth at Night 2012 images </a></b> <b>Click here to <a href="http://earthobservatory.nasa.gov/NaturalHazards/view.php?id=79758" rel="nofollow"> read more </a> about this image </b> <b><a href="http://www.nasa.gov/audience/formedia/features/MP_Photo_Guidelines.html" rel="nofollow">NASA image use policy.</a></b> <b><a href="http://www.nasa.gov/centers/goddard/home/index.html" rel="nofollow">NASA Goddard Space Flight Center</a></b> enables NASA’s mission through four scientific endeavors: Earth Science, Heliophysics, Solar System Exploration, and Astrophysics. Goddard plays a leading role in NASA’s accomplishments by contributing compelling scientific knowledge to advance the Agency’s mission. <b>Follow us on <a href="http://twitter.com/NASA_GoddardPix" rel="nofollow">Twitter</a></b> <b>Like us on <a href="http://www.facebook.com/pages/Greenbelt-MD/NASA-Goddard/395013845897?ref=tsd" rel="nofollow">Facebook</a></b> <b>Find us on <a href="http://instagram.com/nasagoddard?vm=grid" rel="nofollow">Instagram</a></b>

On August 29, 2012, the Visible Infrared Imaging Radiometer Suite (VIIRS) on the Suomi NPP satellite captured this nighttime view of wildfires burning in Idaho and Montana. The image was captured by the VIIRS “day-night band,” which detects light in a range of wavelengths from green to near-infrared and uses filtering techniques to observe signals such as gas flares, auroras, wildfires, city lights, and reflected moonlight. When the image was acquired, the moon was in its waxing gibbous phase, meaning it was more than half-lit, but less than full. Numerous hot spots from the Mustang Complex Fire are visible in northern Idaho. A plume of thick, billowing smoke streams west from the brightest fires near the Idaho-Montana border. The Halstead and Trinity Ridge fires are visible to the south. In addition to the fires, city lights from Boise and other smaller cities appear throughout the image. A bank of clouds is located west of the Mustang Complex, over southeastern Washington and northeastern Oregon. The Operational Line System (OLS)—an earlier generation of night-viewing sensors on the U.S. Defense Meteorological Satellite Program (DMSP) satellites—was also capable of detecting fires at night. But the VIIRS “day-night band” is far better than OLS at resolving them. Each pixel of an VIIRS image shows roughly 740 meters (0.46 miles), compared to the 3-kilometer footprint (1.86 miles) on the OLS system. NASA Earth Observatory image by Jesse Allen and Robert Simmon, using VIIRS Day-Night Band data from the Suomi National Polar-orbiting Partnership. Suomi NPP is the result of a partnership between NASA, the National Oceanic and Atmospheric Administration, and the Department of Defense. Caption by Adam Voiland. Instrument: Suomi NPP - VIIRS Credit: <b><a href="http://www.earthobservatory.nasa.gov/" rel="nofollow"> NASA Earth Observatory</a></b> <b>Click here to view all of the <a href="http://earthobservatory.nasa.gov/Features/NightLights/" rel="nofollow"> Earth at Night 2012 images </a></b> <b>Click here to <a href="http://earthobservatory.nasa.gov/NaturalHazards/view.php?id=79754" rel="nofollow"> read more </a> about this image </b> <b><a href="http://www.nasa.gov/audience/formedia/features/MP_Photo_Guidelines.html" rel="nofollow">NASA image use policy.</a></b> <b><a href="http://www.nasa.gov/centers/goddard/home/index.html" rel="nofollow">NASA Goddard Space Flight Center</a></b> enables NASA’s mission through four scientific endeavors: Earth Science, Heliophysics, Solar System Exploration, and Astrophysics. Goddard plays a leading role in NASA’s accomplishments by contributing compelling scientific knowledge to advance the Agency’s mission. <b>Follow us on <a href="http://twitter.com/NASA_GoddardPix" rel="nofollow">Twitter</a></b> <b>Like us on <a href="http://www.facebook.com/pages/Greenbelt-MD/NASA-Goddard/395013845897?ref=tsd" rel="nofollow">Facebook</a></b> <b>Find us on <a href="http://instagram.com/nasagoddard?vm=grid" rel="nofollow">Instagram</a></b>
On August 29, 2012, the Visible Infrared Imaging Radiometer Suite (VIIRS) on the Suomi NPP satellite captured this nighttime view of wildfires burning in Idaho and Montana. The image was captured by the VIIRS “day-night band,” which detects light in a range of wavelengths from green to near-infrared and uses filtering techniques to observe signals such as gas flares, auroras, wildfires, city lights, and reflected moonlight. When the image was acquired, the moon was in its waxing gibbous phase, meaning it was more than half-lit, but less than full. Numerous hot spots from the Mustang Complex Fire are visible in northern Idaho. A plume of thick, billowing smoke streams west from the brightest fires near the Idaho-Montana border. The Halstead and Trinity Ridge fires are visible to the south. In addition to the fires, city lights from Boise and other smaller cities appear throughout the image. A bank of clouds is located west of the Mustang Complex, over southeastern Washington and northeastern Oregon. The Operational Line System (OLS)—an earlier generation of night-viewing sensors on the U.S. Defense Meteorological Satellite Program (DMSP) satellites—was also capable of detecting fires at night. But the VIIRS “day-night band” is far better than OLS at resolving them. Each pixel of an VIIRS image shows roughly 740 meters (0.46 miles), compared to the 3-kilometer footprint (1.86 miles) on the OLS system. NASA Earth Observatory image by Jesse Allen and Robert Simmon, using VIIRS Day-Night Band data from the Suomi National Polar-orbiting Partnership. Suomi NPP is the result of a partnership between NASA, the National Oceanic and Atmospheric Administration, and the Department of Defense. Caption by Adam Voiland. Instrument: Suomi NPP - VIIRS Credit: <b><a href="http://www.earthobservatory.nasa.gov/" rel="nofollow"> NASA Earth Observatory</a></b> <b>Click here to view all of the <a href="http://earthobservatory.nasa.gov/Features/NightLights/" rel="nofollow"> Earth at Night 2012 images </a></b> <b>Click here to <a href="http://earthobservatory.nasa.gov/NaturalHazards/view.php?id=79754" rel="nofollow"> read more </a> about this image </b> <b><a href="http://www.nasa.gov/audience/formedia/features/MP_Photo_Guidelines.html" rel="nofollow">NASA image use policy.</a></b> <b><a href="http://www.nasa.gov/centers/goddard/home/index.html" rel="nofollow">NASA Goddard Space Flight Center</a></b> enables NASA’s mission through four scientific endeavors: Earth Science, Heliophysics, Solar System Exploration, and Astrophysics. Goddard plays a leading role in NASA’s accomplishments by contributing compelling scientific knowledge to advance the Agency’s mission. <b>Follow us on <a href="http://twitter.com/NASA_GoddardPix" rel="nofollow">Twitter</a></b> <b>Like us on <a href="http://www.facebook.com/pages/Greenbelt-MD/NASA-Goddard/395013845897?ref=tsd" rel="nofollow">Facebook</a></b> <b>Find us on <a href="http://instagram.com/nasagoddard?vm=grid" rel="nofollow">Instagram</a></b>
On August 29, 2012, the Visible Infrared Imaging Radiometer Suite (VIIRS) on the Suomi NPP satellite captured this nighttime view of wildfires burning in Idaho and Montana. The image was captured by the VIIRS “day-night band,” which detects light in a range of wavelengths from green to near-infrared and uses filtering techniques to observe signals such as gas flares, auroras, wildfires, city lights, and reflected moonlight. When the image was acquired, the moon was in its waxing gibbous phase, meaning it was more than half-lit, but less than full. Numerous hot spots from the Mustang Complex Fire are visible in northern Idaho. A plume of thick, billowing smoke streams west from the brightest fires near the Idaho-Montana border. The Halstead and Trinity Ridge fires are visible to the south. In addition to the fires, city lights from Boise and other smaller cities appear throughout the image. A bank of clouds is located west of the Mustang Complex, over southeastern Washington and northeastern Oregon. The Operational Line System (OLS)—an earlier generation of night-viewing sensors on the U.S. Defense Meteorological Satellite Program (DMSP) satellites—was also capable of detecting fires at night. But the VIIRS “day-night band” is far better than OLS at resolving them. Each pixel of an VIIRS image shows roughly 740 meters (0.46 miles), compared to the 3-kilometer footprint (1.86 miles) on the OLS system. NASA Earth Observatory image by Jesse Allen and Robert Simmon, using VIIRS Day-Night Band data from the Suomi National Polar-orbiting Partnership. Suomi NPP is the result of a partnership between NASA, the National Oceanic and Atmospheric Administration, and the Department of Defense. Caption by Adam Voiland. Instrument: Suomi NPP - VIIRS Credit: <b><a href="http://www.earthobservatory.nasa.gov/" rel="nofollow"> NASA Earth Observatory</a></b> <b>Click here to view all of the <a href="http://earthobservatory.nasa.gov/Features/NightLights/" rel="nofollow"> Earth at Night 2012 images </a></b> <b>Click here to <a href="http://earthobservatory.nasa.gov/NaturalHazards/view.php?id=79754" rel="nofollow"> read more </a> about this image </b> <b><a href="http://www.nasa.gov/audience/formedia/features/MP_Photo_Guidelines.html" rel="nofollow">NASA image use policy.</a></b> <b><a href="http://www.nasa.gov/centers/goddard/home/index.html" rel="nofollow">NASA Goddard Space Flight Center</a></b> enables NASA’s mission through four scientific endeavors: Earth Science, Heliophysics, Solar System Exploration, and Astrophysics. Goddard plays a leading role in NASA’s accomplishments by contributing compelling scientific knowledge to advance the Agency’s mission. <b>Follow us on <a href="http://twitter.com/NASA_GoddardPix" rel="nofollow">Twitter</a></b> <b>Like us on <a href="http://www.facebook.com/pages/Greenbelt-MD/NASA-Goddard/395013845897?ref=tsd" rel="nofollow">Facebook</a></b> <b>Find us on <a href="http://instagram.com/nasagoddard?vm=grid" rel="nofollow">Instagram</a></b>

Waning gibbous. Rises after sunset, high in the sky after midnight, visible to the southwest after sunrise. This marks the first time that accurate shadows at this level of detail are possible in such a computer simulation. The shadows are based on the global elevation map being developed from measurements by the Lunar Orbiter Laser Altimeter (LOLA) aboard the Lunar Reconnaissance Orbiter (LRO). LOLA has already taken more than 10 times as many elevation measurements as all previous missions combined. The Moon always keeps the same face to us, but not exactly the same face. Because of the tilt and shape of its orbit, we see the Moon from slightly different angles over the course of a month. When a month is compressed into 12 seconds, as it is in this animation, our changing view of the Moon makes it look like it's wobbling. This wobble is called libration. The word comes from the Latin for "balance scale" (as does the name of the zodiac constellation Libra) and refers to the way such a scale tips up and down on alternating sides. The sub-Earth point gives the amount of libration in longitude and latitude. The sub-Earth point is also the apparent center of the Moon's disk and the location on the Moon where the Earth is directly overhead. The Moon is subject to other motions as well. It appears to roll back and forth around the sub-Earth point. The roll angle is given by the position angle of the axis, which is the angle of the Moon's north pole relative to celestial north. The Moon also approaches and recedes from us, appearing to grow and shrink. The two extremes, called perigee (near) and apogee (far), differ by more than 10%. The most noticed monthly variation in the Moon's appearance is the cycle of phases, caused by the changing angle of the Sun as the Moon orbits the Earth. The cycle begins with the waxing (growing) crescent Moon visible in the west just after sunset. By first quarter, the Moon is high in the sky at sunset and sets around midnight. The full Moon rises at sunset and is high in the sky at midnight. The third quarter Moon is often surprisingly conspicuous in the daylit western sky long after sunrise. Celestial north is up in these images, corresponding to the view from the northern hemisphere. The descriptions of the print resolution stills also assume a northern hemisphere orientation. To adjust for southern hemisphere views, rotate the images 180 degrees, and substitute "north" for "south" in the descriptions. Credit: <a href="http://svs.gsfc.nasa.gov/index.html" rel="nofollow">NASA/Goddard Space Flight Center Scientific Visualization Studio</a> <b><a href="http://www.nasa.gov/centers/goddard/home/index.html" rel="nofollow">NASA Goddard Space Flight Center</a></b> enables NASA’s mission through four scientific endeavors: Earth Science, Heliophysics, Solar System Exploration, and Astrophysics. Goddard plays a leading role in NASA’s accomplishments by contributing compelling scientific knowledge to advance the Agency’s mission. <b>Follow us on <a href="http://twitter.com/NASA_GoddardPix" rel="nofollow">Twitter</a></b> <b>Join us on <a href="http://www.facebook.com/pages/Greenbelt-MD/NASA-Goddard/395013845897?ref=tsd" rel="nofollow">Facebook</a></b> <b>Find us on <a href="http://web.stagram.com/n/nasagoddard/?vm=grid" rel="nofollow">Instagram</a></b>