FACTOID # 70: Contrary to the popular rhyme, the rain falls mainly on Guinea.
 
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A transient lunar phenomenon (TLP) is a sometimes inexplicable change of color or shape seen on the surface of the moon. Some may be caused by gas escaping from underground cavities after moonquakes.


In 1866, the experienced lifelong lunar observer and mapmaker Johann Friedrich Julius Schmidt made the claim that Linné crater had changed its appearance, from a normal, relatively deep crater to a mere white patch. A controversy arose and the claim remains unproven. No further changes have been observed in the crater; if true this would not be a transient change but a permanent one.


On November 2, 1958, the Russian astronomer Nikolai A. Kozyrev observed an apparent outgassing of vapor near the central peak of Alphonsus crater. He took spectrograms that appeared to show the presence of carbon vapor.


Other near-side craters where TLP have been reported are Aristarchus, Grimaldi, Hercules, Plato, Theaetetus and Thales.


References

External links

  • "Light Side of the Moon" (http://members.lycos.co.uk/petergrego/ft105.htm) — An article from the Fortean Times for December 1997 by the astronomer Peter Grego
  • Transient Lunar Phenomena (and other weirdness) (http://www.planetfusion.co.uk/~pignut/tlp.html) — Essay on TLP followed by links
  • Chronological Catalog of Reported Lunar Events, July 1968 (http://www.mufor.org/tlp/lunar.html) — NASA report on TLP sightings from 1540 to 1968

  Results from FactBites:
 
Tactical Leadership Programme Home Page (172 words)
The Allied Command Operations Tactical Leadership Programme (ACO TLP) is an organisation formed under a Memorandum of Understanding between 8 NATO nations.
The objective of the TLP is to increase the effectiveness of allied tactical air forces through the development of leadership skills, tactical flying capabilities, mission planning and tasking capabilities, and conceptual and doctrinal initiatives.
TLP is based at Florennes Air Force Base in Belgium and its three operational branches - Academic Branch, Concepts and Doctrine Branch and Flying Branch - are staffed by experienced personnel from the member nations.
Ace's Hardware (1312 words)
In TLP and the Return of KISS I explained how processors could be better optimised for multi-threaded workloads by using many CPU cores per chip and other techniques.
Moving to TLP optimised systems will not be significantly different to previous generation processors.
How well heavily TLP optimised cores will compete with conventional designs will depend both on their design and time to market, and also what their competitors are doing.
  More results at FactBites »


 

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