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Images by Buzz Aldrin of Goddard Space Flight Center (GSFC) from 1969
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Moonquakes Surprisingly Comm
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| Title |
Moonquakes Surprisingly Common |
| Explanation |
Why are there so many moonquakes? A recent reanalysis of seismometers [ http://en.wikipedia.org/wiki/Seismometer ] left on the moon by the Apollo moon landings [ http://history.nasa.gov/ap11ann/introduction.htm ] has revealed a surprising number of moonquakes occurring within 30 kilometers of the surface. In fact, 28 moonquakes [ http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=2005AGUFM.P51A0915N ] were detected in data recorded between 1972 and 1977. These moonquakes [ http://science.nasa.gov/headlines/y2006/15mar_moonquakes.htm ] were not only strong enough to move furniture [ http://www.maltwood.uvic.ca/hoft/timeline.html ] but the stiff rock of the moon continued vibrating for many minutes, significantly longer than the soft rock earthquakes [ http://www.crustal.ucsb.edu/ics/outreach/understanding/elastic/intro-rebound.html ] on Earth. The cause of the moonquakes remains unknown, with one hypothesis holding that landslides [ http://earthquake.usgs.gov/learning/glossary.php?termID=105&alpha=L ] in craters cause the vibrations. Regardless of the source, future moon buildings [ http://spaceflight.nasa.gov/gallery/images/vision/lunar/ndxpage1.html ] need to be built to withstand the frequent shakings. Pictured above [ http://grin.hq.nasa.gov/ABSTRACTS/GPN-2000-001102.html ] in 1969, Apollo 11 astronaut Buzz Aldrin [ http://en.wikipedia.org/wiki/Buzz_Aldrin ] stands besides a recently deployed lunar seismometer [ http://www.lpi.usra.edu/expmoon/Apollo15/A15_Experiments_PSE.html ], looking back toward the lunar landing module [ http://antwrp.gsfc.nasa.gov/apod/ap030920.html ]. |
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Standing on the Moon
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Standing on the Moon |
| Explanation |
Pictured, the second person to walk on the Moon [ http://antwrp.gsfc.nasa.gov/apod/ap950903.html ]: Edwin "Buzz" Aldrin. During this Apollo 11 [ http://www.ksc.nasa.gov/history/apollo/apollo-11/apollo-11.html ] mission, Neil Armstrong and Buzz Aldrin landed on the Moon while Michael Collins circled in the Command Module above. The lunar team erected a plaque on the surface that reads: HERE MEN FROM THE PLANET EARTH, FIRST SET FOOT UPON THE MOON JULY 1969 A.D., WE CAME IN PEACE FOR ALL MANKIND. The Apollo missions [ http://ees5-www.lanl.gov/APOLLO/ ] demonstrated that it is possible to land humans on the Moon [ http://antwrp.gsfc.nasa.gov/apod/ap950921.html ] and return them safely. |
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Footprints on Another World
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Footprints on Another World |
| Explanation |
On July 20th, 1969 [ http://www.hq.nasa.gov/office/pao/History/ap11ann/ introduction.htm ], humans first set foot on the Moon [ http://seds.lpl.arizona.edu/nineplanets/nineplanets/ luna.html ]. Taken from a window of their Apollo 11 lunar module, the Eagle, this picture shows the footprints in the powdery lunar soil [ http://antwrp.gsfc.nasa.gov/apod/ap011110.html ] made by astronauts Neil Armstrong [ http://www.hq.nasa.gov/office/pao/History/ap11ann/ kippsphotos/5528.jpg ] and Buzz Aldrin [ http://www.hq.nasa.gov/office/pao/History/ap11ann/ kippsphotos/5390.jpg ]. It has been estimated that one billion people on planet Earth watched [ http://guinan.gsfc.nasa.gov/docs/heasarc/videos/ historical.html ] Armstrong step from the lander onto the surface of another world [ http://www.hq.nasa.gov/alsj/ ], making this live transmission one of the highest rated television shows ever. In the foreground at right, a rocket nozzle on the side of the Eagle is seen in silhouette, while beyond an unfurled United States [ http://aesp.nasa.okstate.edu/fieldguide/ ] flag is the television camera, remounted on a stand to better view the landing area. The Apollo missions [ http://www.ksc.nasa.gov/history/apollo/apollo.html ] to the Moon have been described as the result of the greatest technological mobilization in history [ http://www.hq.nasa.gov/office/pao/History/ ]. |
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Standing on the Moon
| Title |
Standing on the Moon |
| Explanation |
Humans once walked on the Moon. Pictured above is the second person to stand on the lunar surface: Edwin "Buzz" Aldrin. During this Apollo 11 mission, Neil Armstrong (the first person to walk on the moon) and Buzz Aldrin landed on the Moon while Michael Collins circled in the Command Module above. The lunar team erected a plaque on the surface that reads: HERE MEN FROM THE PLANET EARTH FIRST SET FOOT UPON THE MOON JULY 1969 A.D. WE CAME IN PEACE FOR ALL MANKIND. The Apollo missions demonstrated that it is possible to land humans on the Moon and return them safely. |
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