Photos: 50 years of views from the moon

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  1. Up-close exploration of the moon, Earth's only natural satellite, began in 1959 when the Soviet Union launched its Luna 1 spacecraft on a flyby mission. NASA quickly followed up with missions of its own. Since then, the Europeans, Japan, China and India have launched their own lunar exploration programs. This view shows the moon as seen from the international space station. Click the "Next" arrow above to check out 11 images from the moon made over the last 50 years. (NASA) Back to slideshow navigation
  2. 1959: Far side in full view

    In October 1959, the Soviet Union's Luna 3 spacecraft - the third successfully launched to the moon - made history as the first probe to image the far side of the moon. The photos were fixed and dried on the spacecraft and beamed back to Earth. Though fuzzy by today's standards, the images showed stark differences from the near side, including relatively few dark areas, called lunar maria. (RSA via NASA) Back to slideshow navigation
  3. 1966: A restored ‘Earthrise'

    In 1966 and 1967, NASA sent a series of Lunar Orbiter spacecraft to collect detailed images of moon's surface in preparation for the Apollo program. The tapes were then put in storage. Decades later, researchers with the Lunar Orbiter Image Recovery Project collected the vintage hardware required to play back the imagery. That imagery was digitized , reproducing the images at a much higher resolution than previously possible. On Nov. 11, 2008, the project researchers released this enhanced photograph of Earth rising above the lunar surface, originally made by Lunar Orbiter 1 in 1966. (LOIRP / NASA) Back to slideshow navigation
  4. 1968: The most famous 'Earthrise'

    On Christmas Eve 1968, Apollo 8 astronauts Frank Borman, Jim Lovell and William Anders made history as the first humans to orbit the moon. They were scouting its surface for a suitable landing spot for future missions. But the sight of Earth rising above the moon's horizon caught their - and the world's - attention. The photograph, called "Earthrise," is among the most famous ever made from the moon. (NASA) Back to slideshow navigation
  5. 1969: One small step

    On July 20, 1969, an estimated 1 billion people around the world were glued to television screens to watch astronaut Neil Armstrong, commander of Apollo 11, climb down from the lunar module spacecraft for a stroll on the moon. As his foot touched the lunar surface, he famously said "That's one small step for (a) man, one giant leap for mankind." This image is a black-and-white reproduction from the telecast, showing Armstrong stepping down from the lunar module's ladder. (NASA Johnson Space Center) Back to slideshow navigation
  6. 1969: Man on the moon

    Apollo 11 astronaut Buzz Aldrin, shown here, accompanied Armstrong for the famous walk on the moon. This iconic image is one of the few that shows Armstrong on the lunar surface - as seen in the reflection on the spacesuit's visor. The astronauts walked around on the lunar surface for about two and a half hours. (NASA) Back to slideshow navigation
  7. 1994: Looking for ice

    This mosaic image of the moon's southern polar region, made by the Clementine spacecraft in 1994, suggested that the region could harbor water ice within regions of its craters that are never lit by the sun. The water ice would be left over from impacting comets. Scientists have debated the evidence for and against water ice at the poles ever since the Clementine discovery. The current era of lunar exploration could resolve the debate. If water ice exists, it could help quench the thirst of future human colonists and be used to make fuel for rockets. (NASA / JPL / USGS) Back to slideshow navigation
  8. 2006: European moon probe crashes

    On Sept. 3, 2006, the European Space Agency's SMART-1 spacecraft went out with a bang - a planned crash landing into a volcanic plain called the Lake of Excellence. The impact, shown here, was captured by the Canada-France-Hawaii Telescope. (The black lines are a processing error due to the brightness of the event.) The spacecraft was launched in 2003 primarily to test an ion propulsion system, which uses energy captured by the sun to produce a stream of charged particles. The slow-and-steady propulsion system may be used on future interplanetary missions. (Christian Veillet / CFHT via AP) Back to slideshow navigation
  9. 2007: China targets the moon

    China made its first major strides in the lunar exploration game with the launch of the Chang'e 1 spacecraft in October 2007. The orbiter was sent to make a detailed, 3-D map of the moon's surface. Premier Wen Jiabao unveiled the first image at a ceremony in Beijing, shown here. Chang'e 1's 16-month mission ended with a controlled crash. The country reportedly plans to launch lunar rovers in 2010 and 2017, and a manned mission to the moon by 2020. (Huang Jingwen / XINHUA NEWS AGENCY) Back to slideshow navigation
  10. 2008: India joins the lunar club

    The Indian Space Research Organization successfully launched its Chandrayaan 1 spacecraft on Oct. 22, 2008, for a mapping mission to the moon. A probe released from the mothership took this picture of the lunar surface during its descent to a planned crash landing at the south pole. The Indian space agency plans to use this and other data for a lunar rover mission in 2011 and, eventually, a manned mission. (ISRO via EPA) Back to slideshow navigation
  11. 2009: Japan orbiter watches eclipse

    Some eclipse enthusiasts travel the globe to glimpse alignments of the sun, Earth and moon. Japan's Kaguya probe did them one better: It shot this sequence of a Feb. 10, 2009, eclipse from its lunar orbit. The image shows the view of the sun from the moon mostly covered by Earth. The "ring" appears dark at the bottom because it is obscured by the night-darkened limb of the moon. The Kaguya orbiter was launched in September 2007 to study the moon's origin and evolution. It made a controlled crash landing on the moon in June 2009. (JAXA / NHK) Back to slideshow navigation
  12. 2009: NASA goes back to the moon

    On June 18, 2009, NASA launched two spacecraft to the moon to map its surface in unprecedented detail, scout for future landing sites, and smash probes into a permanently shaded crater in hopes of resolving a longstanding debate over whether such regions contain water ice. NASA's Lunar Reconnaissance Orbiter will orbit both poles for a year, and its mission could be extended to serve as a communications relay for future lunar missions. This is one of the first pictures sent back by the orbiter. LRO's sibling, the crater-smacking LCROSS probe, is due to impact the moon's south pole in October. (NASA / GSFC / ASU) Back to slideshow navigation
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updated 4/27/2010 2:39:01 PM ET 2010-04-27T18:39:01

A miniature magnetic field has been imaged on the surface of the moon, making it a rare, minimally protective lunar refuge from some aspects of the harsh solar wind.

The magnetic region could be a great place to site a lunar base, since tomorrow's lunar colonists will not only need water (check!), but some protection from the heavy radiation in the solar wind.

"You can think of it as kind of a mini umbrella," said Martin Wieser of the Swedish Institute of Space Physics in Kiruna, Sweden. "It will be effective for certain kinds of (space) weather."

But it is very weak in comparison to Earth's planet-wide magnetic field or even compared to the splotchy magnetospheres of Mars.

The 224-mile- (360-kilometer-) wide magnetosphere was detected by an instrument on the Indian Chandrayaan-1 spacecraft. The mini magnetosphere revealed itself by fewer hydrogen atoms scattering off the surface of the moon. Generally when the solar wind rams into the airless surface of the moon, some hydrogen atoms scatter back into space. Any place with fewer of these atoms rising up from the moon is likely to be shielded magnetically, explained Wieser and his colleagues in their paper published in Geophysical Research Letters.

The researchers also noticed that the dust inside the magnetically shielded zone is brighter than the surrounding areas, which might have something to do with the solar wind weathering that surface differently over the eons.

"I think this is a very exciting observation," said lunar researcher Jasper Halekas of the Space Science Laboratory at the University of California at Berkeley. "There have been a number of indications that theses things were taking place. (But) this is the first directed study that really tells you 'they are there.'"

The lunar magnetospheres are a lot like those on Mars, said Halekas, except that on Mars they are almost certainly the remnants of a global magnetic field that was created by the planet's core. A molten core dynamo on the moon is a bit less likely, however.

"It's still quite possible that there was a dynamo on the moon," said Halekas.

Another possibility is that the mini-magnetosphere was generated by large impacts on the direct opposite side of the moon. Exactly how this works is far from clear, but there does seem to be a correlation between large impact craters and magnetic anomalies at their antipodes, said Wieser.

Ironically, the same magnetic shielding could make these the driest places on the moon. One mechanism believed to generate at least the ingredients for water on the moon are solar protons smacking into the surface, forming hydrogen atoms in the lunar soils. Inside a mini magnetosphere that is less likely to happen, Wieser noted.

Without water, maybe this isn't the best lunar real estate after all.

© 2012 Discovery Channel

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