Search results
Results from the WOW.Com Content Network
The locations of lunar retroreflectors left by Apollo (A) and Luna (L) missions. Retroreflectors are devices which reflect light back to its source. Six were left at six sites on the Moon by three crews of the Apollo program, two by remote landers of the Lunokhod program, and one by the Chandrayaan program. [1]
Annotated image of the near side of the Moon showing the location of retroreflectors left on the surface by Apollo and Lunokhod missions [19]. The distance to the Moon is calculated approximately using the equation: distance = (speed of light × duration of delay due to reflection) / 2.
APOLLO shooting a laser at the Moon. The laser pulse is reflected from the retroreflectors on the Moon (see below) and returned to the telescope. The round-trip time tells the distance to the Moon to great accuracy. In this picture the Moon is very over-exposed, needed to make the laser beam visible. Apollo 15 Lunar Ranging Retro-Reflector (LRRR).
The Moon's surface can scatter a laser beam and produce a sufficiently strong enough signal to be detected on Earth, resulting in ranging measurements that were accurate to within 120 meters (390 ft). Beyond this though the effects of terrain became problematic, and when combined with a returned signal strength that is both weak and temporally ...
Abing's most famous piece is entitled Erquan Yingyue (二泉映月, English: The Moon's Reflection on the Second Spring), which is named after a spring in Wuxi (which is today part of Xihui Park). It is still played as a standard erhu piece, although it necessitates a special set of strings that are tuned lower than normal erhu strings.
Sunlight is reflected from Earth to the night side of the Moon. The night side appears to glow faintly, and the entire disk of the Moon is dimly illuminated. Earthshine reflected from the Moon, as seen through a telescope. The bright region is directly illuminated by the Sun, while the rest of the Moon is illuminated by sunlight reflected from ...
The Moon Zodiacal light Reflection nebula. This is a list of reflected sources of light examples in contrast to the List of light sources. The list is oriented ...
Best visible shortly before or after a new moon (during the waning and waxing crescent phases respectively), Earthshine is the faint glow of the non-illuminated (night) side of the Moon caused by sunlight reflecting off the surface of Earth (which would appear nearly full to an observer situated on the Moon at this time) and onto the night side ...