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Topic: Alphonsus crater


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In the News (Sun 27 May 12)

  
  Alphonsus (crater) - Wikipedia, the free encyclopedia
To the northwest is the smaller Alpetragius crater.
Alphonsus crater was one of the primary alternative landing sites considered for both the Apollo 16 and the Apollo 17 missions.
The Ranger 9 probe impacted in Alphonsus crater, a short distance to the northeast of the central peak.
en.wikipedia.org /wiki/Alphonsus_crater   (606 words)

  
 Alpetragius (crater) - Wikipedia, the free encyclopedia
Alpetragius is a lunar impact crater located on the east edge of Mare Nubium, to the southwest of the much larger Alphonsus crater.
In the southeast is the prominent Arzachel crater, and to the west lies the flooded Lassell crater.
An arc of craterous depressions from the south rim of Alphonsus crater curses to the west, dividing Alpetagnius from Arzachel crater.
en.wikipedia.org /wiki/Alpetragius_(crater)   (284 words)

  
 Ranger 9
Alphonsus, diameter 108 km, is at lower left and the 114 km Albategnius crater is at lower right.
The crater adjacent to Alphonsus at the bottom is the 39 km diameter Alpetragius.
The intersecting crater rims exhibit a chaotic, mountainous terrain, in sharp contrast to the flat crater floors.
www.unm.edu /~abqtom/ranger9.htm   (363 words)

  
 Ranger 9   (Site not responding. Last check: 2007-10-30)
This crater was excavated in the floor of Alphonsus on March 24, 1965, by the Ranger 9 spacecraft.
The final impact point of Ranger 9 is in the Alphonsus crater, midway between the central peak and rim at about 1:30.
The image, taken on 20 February 1965, shows the floor of Alphonsus crater and is centered at 12.8 S, 2.3 W. The frame is about 2.5 km across and north is at 12:30.
www.astrosurf.com /lunascan/Ranger9.htm   (1017 words)

  
 ALPHONSUS
"The lunar crater Alphonsus occupies a special place in the literature of lunar surface happenings because something that was observed within its walls during November, 1958, was the only really well authenticated example of TLP at that time.
Altar cautiously suggested that the blurring effect in the violet light could be due to light scattering by a temporary or permanent atmosphere on the floor of Alphonsus, possibly an emission of gas from the clefts.
The crater Alphonsus is truly a remarkable crater to study and recommend to all observers to study this formation well.
www.ltpresearch.org /alphonsus1.htm   (803 words)

  
 Associazione Lunar Explorer Italia - Fotografie ed Immagini della Luna, Marte, Il Sistema Solare e l'Universo - Before ...
Bruce Crater and Sinus Medii-51 visteCaption NASA originale:"Lunar Orbiter 3 oblique view of Bruce Crater in the foreground and the Sinus Medii Mare plain on the Moon.
Tsiolkovsky Crater on the far-side of the Moon-81 visteCaption NASA originale:"Lunar Orbiter 3 view of Tsiolkovsky crater and the southern zone of the western far side of the Moon.
The approximately 240 Km crater at the upper center of the image is located at 20° S, 130° E and exhibits a flat, dark infilled floor and prominent central peak.
www.lunexit.it /gallery/thumbnails.php?album=60&page=5   (1013 words)

  
 Alphonsus
Alphonsus is a large, famous crater near the center of the lunar nearside, and is one of lunar observers’ perennial favorites.
Alphonsus escaped being overwhelmed by the ejecta and uplift, but the crater walls were eroded and almost certainly settled as a result of the Imbrian impact, and the stresses of that impact also probably further weakened the crust in the floor of the crater.
Alphonsus’ floor and Arzachel’s peak have the same general composition, which may give slightly more weight to the theory that the anorthosite deposit is deeper than Arzachel’s peak uplift.
jeff.medkeff.com /astro/lunar/r_ptolemaeus/alphonsus   (1854 words)

  
 3towers Observatory Lunar 1000   (Site not responding. Last check: 2007-10-30)
West of it is the complex crater Stofler with Faraday overlying its Southwest rim.
Alphonsus is the crater left of center with a central peak.
To the East of it is the crater Alphonsus with its dark spots.
www.3towers.com /3towersObservatoryLunar100.htm   (1149 words)

  
 Lunar Images   (Site not responding. Last check: 2007-10-30)
Note, that not only are the 5 craters within Plato clearly visible but there us a hint of a number of even smaller ones as well.
The small craters inside of Clavius are suitable for testing the resolution of smaller telescopes, as each one is progressively smaller.
The small crater at the southern termination of the rile is about 3.1km wide and 470m deep.
www.astroimaging.com /Lunarsmall.htm   (1149 words)

  
 Lake County Astronomical Society NightTimes
Secondary crater chains on the Moon are common, but such chains are usually radial or nearly radial to a large crater or basin, occur in the vicinity of other such chains, and have raised rims with a characteristic ‘chevron’ imprint between craters that point back to the primary.
Because the craters in the Albulfeda chain are roughly five times larger than those in the Davy chain, it is not unreasonable to suggest that the Albulfeda chain is roughly five times longer.
On your atlas, Davy is shown as the small crater to the (lunar) east of the large crater Alphonsus.
www.bpccs.com /lcas/Articles/davy.htm   (698 words)

  
 Alphonsus (lunar crater)
A lunar crater, 118 km (73 miles) in diameter, on the eastern edge of Mare Nubium, which has frequently been associated with transient lunar phenomena (TLP).
Five dark patches are visible along the crater floor edge, each with a central pit.
Also, most of these pits are also elongated or irregular in shape, making it unlikely that they are impact craters.
www.daviddarling.info /encyclopedia/A/Alphonsus.html   (237 words)

  
 [No title]   (Site not responding. Last check: 2007-10-30)
Alphonsus was at one time slated for the Apollo 17 mission.
It was also thought at the time that many of the small craters on the Alphonsine floor were volcanic in origin, and sampling might give clues as to when tectonic activity ceased in the moon's interior.
RLC 14 is the second of the Alphonsus sequence; it is filled by the crater, and corresponds more or less to the exhibited photograph from Ranger IX (see item 40).
www.lhl.lib.mo.us /events_exhib/exhibit/exhibits/moon/p41.htm   (245 words)

  
 ch6.3
The fissures and cracks appear to be related to the uplift of the crater floor subsequent to the formation of the crater.
The floor of Alphonsus is broken by faults that form a polygon roughly parallel to the walls.
The chain of craters in the mare of Oceanus Procellarum is believed to be secondaries from the crater Aristarchus (outside of the view).
www.hq.nasa.gov /office/pao/History/SP-362/ch6.3.htm   (1650 words)

  
 Ptolemy's Neighborhood   (Site not responding. Last check: 2007-10-30)
His crater may overlay Alphonsus' to the north, but his work underlies thyat crater's namesake; for his astronomical tables, the Toledan Tables, were later supplanted by the more accurate Alphonsine tables commissioned by Alphonsus, a medieval King of Spain, otherwise known as Alphonso the Tenth.
A lot has been written about the crater Alphonsus, famous for it's Lunar Transient Phenomena sightings as well as it's six notable dark spots consisting of material spewed from small volcanic vents which can be seen as tiny pits under ideal seeing conditions.
The last feature of interest of Alphonsus' is the very little noticed crater Alphonsus B, marked (c) on the graphic and partially lying on Alponsus' eastern rim.
www.cityastronomy.com /ptolemy-article.htm   (1842 words)

  
 JeffPo's Lunar Page   (Site not responding. Last check: 2007-10-30)
I zoom in on a crater, examine it's floor and central peak.
Notice the central peaks and the shadow of the crater rim lying on the crater floor.
The rims of the crater have the early morning light, while the floor of the crater hangs onto the darkness of night.
www.mindspring.com /~jeffpo/lunar.htm   (900 words)

  
 Lunar Studies   (Site not responding. Last check: 2007-10-30)
So...turns out it's real enough; it is present on numerous images of this crater such as this image taken by Oliver Pettenpaul-- and is also indicated in the same location on the Rukl chart as well.
The second feature arguing for a crater form here is the generally curved and elevated area indicated by the small arrows which, at lower sun angles, serves to define the 'circularity' of this formation as seen visually.
Also--look again at the much more unambiguous crater form directly north and adjacent to the ghost--this crater has seen a large block of Alphonsus' wall slump into it--in fact much of it is destroyed due to later infall of the neighboring wall--the effect upon the larger wall in this case is not negative but positive.
www.cityastronomy.com /alphonsus-ghost.htm   (1246 words)

  
 CRATERS ARZACHEL & MAGINUS   (Site not responding. Last check: 2007-10-30)
97 km diameter crater Arzachel with its single central peak was imaged with a 15cm Intes-Micro Maksutov- Cassegrain reflector and Astrovid 2000.
Crater Thebit is at upper left of Arzachel, Alpetragius, to far right, its massive central peak summit just being revealed by morning light.
Crater Maginus in afternoon light is actually referred to as a vast walled plain measuring some 163 km across.
www.lafterhall.com /craters04.html   (109 words)

  
 TLP Text
On January 24, 1956 amateur lunar observer R. Houghton was drawing the crater Liebig on the edge of Mare Humorum when something bright flashed in the field of his 7-inch telescope.
Closer inspection revealed that a peak on the crater's eastern wall was repeatedly flashing.
The epicenter of that quake was near or in the large, fractured crater Gauss north of Mare Crisium.
www.lunaranomalies.com /TLPtext.htm   (1534 words)

  
 Observing The Sky » Moon: Day 7 - “Walter’s Abyss”
South of Walter, the connected craters of Licetus and Heracletus reside with about 1/2 of their floors in shade.
Crater Manillius stands out alone in Mare Vaporum, almost half in shadow within, but the shadow of the partly revealed Apennines Mountains makes a fingerlike extension of the terminator northeastward.
The craters of Aristillus and Autolycus are revealed but appear as fl punctures in the Mare Imbrium.
www.lpod.org /ots/?p=463   (358 words)

  
 Where No Man Has Gone Before, Ch13-7
Two landing sites had been seriously considered for Apollo 16, the crater Alphonsus, 300 miles (480 kilometers) south of the moon's center, and the region some 340 miles (550 kilometers) east-southeast of the moon's center, north of the ancient crater Descartes.
The wall of Alphonsus was, some argued, pre-Imbrian highlands material, while dark craters on its floor were thought to consist of relatively young volcanic material that might have originated at great depths.
60 Alphonsus remained a strong candidate, but in view of the fact that it would be preferable to have more results from Apollo 14 and 15 before landing there, Descartes was preferred for Apollo 16.
www.hq.nasa.gov /office/pao/History/SP-4214/ch13-7.html   (1137 words)

  
 LPOD lunar photo of the day
The rille is shown on Lunar Obiter IV images just to where it enters Imbrium and then it disappears.
But on Wes’ image the rille skirts a small crater (Plato X on USGS Lunar Chart LAC 12 and strikes out across the mare heading to the gap between two outlying hills of the Teneriffe Mountains.
I have not found any map or image that shows this rille beyond the Plato X. One hundred fifty years ago such a discovery as this would lead to claims of changes on the Moon.
www.lpod.org /LPOD-2004-03-24.htm   (336 words)

  
 CHAPTER 2
A carbon spectrum was obtain from an L. in the crater Alphonsus".
An example would be dark filled interior of a crater being observed but the sun angle being to high for any shadows to be cast inside it.
The crater Bullialdus has a feature on the west wall which casts a spectacular round shadow while the crater is still under relatively high angle of illumination.
www.ltpresearch.org /MANUAL/chap2.html   (1026 words)

  
 K3's Astronomy - Moon
Its walled plain is decorated by a half circle of 6 small craters like a string of pearls.
Nice shadow of Plato's crater border is visible in the bottom of crater Plato.
It is interesting to see the central peak in Alphonsus crater and compare it to the below photo.
www.pk3.org /Astro/moon_details_new.htm   (1186 words)

  
 Астронет > Volcanic Craters on the Moon
At one time or another nearly all lunar craters from Copernicus to Messier have been consider volcanic - but virtually all craters can now be convincingly re-interpreted as products of impact cratering.
On Earth, cinder cones, such as Sunset Crater in northern Arizona, are tall and have steep (30 degrees) sides.
Head and McGetchin realized that with the Moon's lower gravity and lack of atmosphere, exactly the same eruption on the Moon would produce a broad and low crater very much like these dark halo ones in Alphonsus.
www.astronet.ru:8100 /db/msg/1200437   (237 words)

  
 TIME.com: Volcano or Not? -- Feb. 2, 1959 -- Page 1   (Site not responding. Last check: 2007-10-30)
While he was watching, he saw the small, central peak of the crater lose its sharpness and turn reddish.
The reddish patch over the crater's central peak he believes was caused by volcanic ash shot out of the moon's crust.
It would trap under the crater's floor the heat generated by radioactivity in the moon's rock.
www.time.com /time/magazine/article/0,9171,894124,00.html   (636 words)

  
 OEDILF - Word Lookup
The crater Alphonsus, diameter 119 km, approximately 3.8 billion years old, named for Alphonso X, is famous as the impact site of the Ranger 9 probe in 1965.
A volcanic cone and crater straddling a rille on Alphonsus' floor was an alternate destination for Apollo 16.
The information on this page may not be reproduced in any form without written permission by the.
www.oedilf.com /db/Lim.php?Word=Alphonsus   (143 words)

  
 Seven Wonders of the Moon
Crater Ptolemaeus, Alphonsus and Arzachel indubitably combine to form one of the grandest area on the
and crater with large off-center peak and fairly rough floor.
Alphonsus has several craterlets surrounded by fl material.
www.cloudynights.com /item.php?item_id=1359   (1506 words)

  
 Farshores Space Mysteries Index Page
One area, Aristarchus- Herodotus-Schroters Valley, is responsible for fully one-third of the total number sighted.
On October 30, 1963, James Greenacre and Edward Barr observed red spots sparkling on the southwest wall of the crater Aristarchus, the east wall of Schroter's Valley, and a hill between them (S&T: December, 1963, page 316).
I am of the opinion that tidal strain or thermal shock causing outgassing and producing a piezoelectric effect might be the most plausible explanation.
farshores.250free.com /moretlp.htm   (2181 words)

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