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Topic: Ptolemaeus (Lunar crater)

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	Ptolemaeus Region (Site not responding. Last check: 2007-11-07)
		Ptolemaeus is therefore the largest and oldest crater in the Lunar Snowman, consisting of the progressively younger craters Alphonsus and Arzachel to the south.
		Ptolemaeus' floor is covered with a ropy bright albedo texture, with several large irregular dark spots, especially in the western end of the crater.
		The ninety degrees of this older crater's rim is all that remains of it.
	jeff.medkeff.com /astro/lunar/r_ptolemaeus/index.htm (2342 words)

	Ptolemaeus
		is an ancient lunar impact crater close to the center of the near side.
		To the south-southeast Ptolemaeus is joined to the rim of Alphonsus crater by a section of rugged, irregular terrain, and these form a prominent chain with Arzachel to the south.
		The crater has a low, irregular outer rim that is heavily worn and impacted with multiple smaller craters.
	www.astrosurf.com /grenier/crateres/pages/ptolemaeus.htm (495 words)

	crater (Site not responding. Last check: 2007-11-07)
		Crater of Beker is een klein sterrenbeeld aan de zuidelijke hemel, maar nog zichtbaar op de breedte van de Benelux.
		Crater (Latin for cup) is one of the 88 modern constellations and was also one of the 48 listed by Ptolemy.
		In the formation of lunar craters, large blocks of rock (perhaps as large as several hundred meters across) are thrown great distances from the crater.
	dict.vocamania.com /crater.aspx (838 words)

	Courses in Astrophotography
		Schickard is on of the largest craters on the lunar near side, and lies close to the south west limb.
		This crater is 40km in diameter, and 3600m from the crater floor to rim.
		This is a well-known lunar impact crater 83km in diameter and lies on the eastern edge of the Mare Imbrium.
	www.damianpeach.com /lunar.htm (3755 words)

	Craters- The Moon
		Impact craters are the remains of collisions between an asteroid, comet, or meteorite and the Moon.
		Euler crater, a complex crater with a diameter of 17 miles (28 km) and a depth of 1.5 miles (2.5 km).
		Lunar craters with a diameter over about 15 kilometers have more complex forms, including shallow, flat floors made of solidified lava, central uplifting (a single peak, multiple peaks, or a ring), and terraces on the inner-rim walls.
	www.enchantedlearning.com /subjects/astronomy/moon/Craters.shtml (731 words)

	Moon Watching
		These small craters will only be visible for a day or two, after that, the crater floor is flooded with sunlight and they will be impossible to see.
		On this lava plain are the craters Autolycus, Aristillus and Archimeded, the latter being the largest.
		South of this, almost in the middle of the Moon is a crater chain consisting of Ptolemaeus, Alphonsus and Arzachel.
	starryskies.com /The_sky/events/lunar-2003/moonwatching.html (1505 words)

	ALS Lunar Observers Certificate List of Objects
		Crater Fracastorius: a large crater which demonstrates the geologic history of the region: it transects the Nectaris Basin wall, indicating that it occurred after the Nectaris Basin impact.
		Crater chains are generally the result of a string of meteorites which are still gravitationally bound.
		Crater Tycho: One of the youngest complex craters on the moon.
	www.lunar-reclamation.org /observation_list.htm (2616 words)

	Impact craters
		This is the excavation stage when the material excavated from the crater is distributed radially as a blanket of fragmented debris or "ejecta".
		Craters are a most useful tool to establish the relative ages of surfaces and thus to better understand how a planet has evolved, for example, to learn what have been the rates of erosion and sedimentation.
		The martian chronology is a relative chronology by comparison to the lunar one which is absolute and was calibrated by datation established on the lunar samples brought back by the Apollo missions.
	cmex.ihmc.us /CMEX/data/SiteCat/sitecat2/crater.htm (1048 words)

	ROBINSON LUNAR OBSERVATORY (Site not responding. Last check: 2007-11-07)
		Dead center of the terminator, and lunar disk, i could see the large crater had a fan shaped spray of light emanating from around 9°s, and 5°w.
		The lowered crater rim was due west of the center and north of ptolemaeus e.
		Ptolemaeus: -048,-158; A great walled-plain, over 90 miles in diameter, and very favorably placed for observation near the center of the disk, with complex and, in part, discontinuous walls, divided by valleys and passes into separate mountain masses, with numerous spurs, and projections onto the interior...
	www.lunar-occultations.com /rlo/rays/ptolemaeus.htm (397 words)

	Albategnius (crater) - Wikipedia, the free encyclopedia
		Offset to the west of the crater mid-point is the central peak of Albategnius.
		Albategnius is located to the south of the Hipparchus crater and to the east of Ptolemaeus and Alphonsus craters.
		The Albategnius crater is believed to have been featured prominently in an early sketch drawing by Galileo in his book Sidereus Nuncius published in 1610, appearing along the lunar terminator.
	en.wikipedia.org /wiki/Albategnius_(crater) (278 words)

	craters of Mars (Site not responding. Last check: 2007-11-07)
		Lunar variations are almost always caused by the changing illumination (except in the rare instances of a verifiable TLP).
		Lunar, solar and planetary detail frequently entails the detection of dark spots seen against a light background.
		That craters were known to exist on Mars is clearly shown in an article in the Philadelphia Inquirer, October 15th.
	www.brayebrookobservatory.org /BrayObsWebSite/HOMEPAGE/forum/cratersonmars.html (4340 words)

	Imaging the lunar surface
		Observations of the Ptolemaeus crater was conducted for the Geologic Lunar Researches (GLR) Project to capture images of the crater.
		Ptolemaeus is 164 km in diameter and is centered at 9.3 S, 1.9 W. The interior of the crater is covered by the Cayley formation, a light-colored unit characterized by the gentle ridges and depressions, and numerous small craters.
		The floor of the degraded crater Ptolomaeus is indeed subdued, and in its northern portion it has a deposit of brighter, hummocky material with numerous small bright craters---this deposit and these craters are almost certainly from the younger Herschel crater.
	digilander.libero.it /gibbidomine/tolo.htm (1523 words)

	Ray Reports (Site not responding. Last check: 2007-11-07)
		The crater floor was in near-darkness, a soft streaky gray, extending east/west.
		I find times for which the lunar co-longitude of the sun is 272.2 degrees.
		I have not attempted the corresponding shadow at 3Q, that is, sunset in the crater.
	www.lunar-occultations.com /rlo/rays/ptolemaeusr.htm (362 words)

	Lunar Images (Site not responding. Last check: 2007-11-07)
		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.
		The area at the left of the image is the area that JPL crash landed the Lunar Orbiter into in an attempt to ascertain if water was present in one of the South Pole craters.
	www.astroimaging.com /Lunarsmall.htm (1149 words)

	LPOD - Lunar Photo of the Day
		The floor of Ptolemaeus is famous for its shallow depressions called saucers.
		The two biggest craters on the floor are the fresh, 10 km wide Ptolemaeus A (Ammonius) and Ptolemaeus B, a saucer.
		The ridges west of the crater A are reminiscent of lava flow levees, and with only a little imagination it could be speculated that remnants of smooth material still exist at the end of the levees.
	www.lpod.org /archive/LPOD-2004-08-12.htm (328 words)

	Steve Guida's Lunar Photography
		Note how the craters and mountains become visible along the terminator, the dividing line between sunlight and darkness.
		Visible features in this shot of the lunar crater fields in its southern hemisphere are Tycho, the rayed crater, which you can see during a full moon with the naked eye, and Gassendi, a walled plain.
		There is an interesting little arc of craterlets in Clavius, starting with Humboldt, then Clavius D, C, N and J. This other high-resolution image shows an interesting display of shadows on the flat floor of the crater Ptolemaeus.
	www.bunnyman.net /images/lp.htm (498 words)

	Herschel (lunar crater) - Wikipedia, the free encyclopedia
		About a crater diameter to the northwest is the Flammarion walled plain, along the southern edge of the Sinus Medii.
		This peak is offset slightly to the west of the crater mid-point.
		The small crater 'Herschel G' is attached to the south-southwest rim, and a tiny craterlet lies across the southern rim.
	en.wikipedia.org /wiki/Herschel_(lunar_crater) (247 words)

	Shoestring Astronomy - L75 - Ptolemaeus B (Site not responding. Last check: 2007-11-07)
		Within the 93 mile diameter crater of Ptolemaeus, there are several craterlets.
		Ptolemaeus B is a very subtle saucer that requires the proper shadowing to reveal.
		This image was taken on 26-May-2004 through a 203mm Celestron C-8 Schmidt-Cassegrain reflector with f/6.3 focal reducer afocally coupled to an Olympus C-700 digital camera through a 40mm eyepiece.
	www.shoestringastronomy.com /lunar/L075.htm (55 words)

	Ptolemaeus Lunar Crater \| Mcdonald Crater (Site not responding. Last check: 2007-11-07)
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	dspp.info /ptolemaeus-lunar-crater.htm (334 words)

	Астронет > Ptolemaeus Peak Heights
		Lunar observers, long impressed by lengthy shadows of peaks, have often speculated on the their heights.
		Similar techniques (but mechanized) of measuring feature positions on Apollo 16 Metric stereo photographs were used by the US Defense Mapping Agency to produce maps with 300 m contours.
		This excerpt from map LM 77 - Ptolemaeus (1:1m; 1978) shows the same area as in yesterday's LPOD.
	www.astronet.ru:8101 /db/msg/1200167 (331 words)

	Ptolemaeus (lunar crater) - Wikipedia, the free encyclopedia
		For the Ptolemaeus crater on Mars, see Ptolemaeus (crater on Mars).
		The following crater has been renamed by the IAU.
		See the reference table for the general listing of literature and web sites that were used in the compilation of this page.
	en.wikipedia.org /wiki/Ptolemaeus_(lunar_crater) (399 words)

	Lunar images
		The steep terraced walls at the edge of the crater are about 6500 feet high.
		This remarkable crater is 59 miles in diameter with a central mountain 4500 ft. high.
		is the crater short with a diameter of 30 miles.
	www.edwardroach.com /Moon.html (895 words)

	Giordano Bruno Crater \| Ptolemaeus Lunar Crater (Site not responding. Last check: 2007-11-07)
		I'm sure that you'll be pleased with all the research we've done for you about crater lake lodging to send you to the best web sites.
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		The biggest benefit that the web molokini crater pictures shop fronts have on real-world stores crater lake camping organizations is the capacity to transform in response to transformations in the marketplace.
	dspp.info /giordano-bruno-crater.htm (308 words)

	Pt (Site not responding. Last check: 2007-11-07)
		'''Ptolemaeus (crater)''' can mean any of the following: '''Ptolemaeus (Lunar* crater)Ptolemaeus crater''' on the Moon.
		'''Ptolemaeus (crater* on Mars)Ptolemaeus crater''' on Mars (planet)Mars.
		eponym=Claudius Ptolemaeus}} '''Ptolemaeus''' is an ancient lunar impact crater close to the center of the near side.
	www.gateserver.net /Topicsbycategory.aspx?catid=438&name= (1182 words)

	Lunar Map Pro 2.0 and Basic Edition Features
		Have you ever wondered if there is a way to determine the diameter of a lunar crater near the limb, where the oblique angle of view creates a highly exaggerated, elongated view of the feature?
		When you use the Surveyor Tool to measure lunar features and surface distances, the software automatically adjusts for the projection, as well as the spatial and plane coordinates, and provides a very accurate measurement.
		A measurement taken from north to south, using Lunar Map Pro's Surveyor Tool will show it to be 79.06 miles or 127.3 Km or 69.60” of arc in diameter on 6/14/2003.
	www.riti.com /prodserv_lunarmappro_features11measure.htm (239 words)

	The Full Moon Atlas
		The northeastern section of Mare Nubium (lower left) dominates the region, with the large craters Ptolemaeus, Alphonsus and Arzachel forming a chain near the center of the photograph.
		Crater Hipparchus appears near the upper right, with Crater Horrocks located near its northern inner rim.
		When displayed, approximate crater diameters (in kilometers) are shown within parenthesis.
	www.lunarrepublic.com /atlas/sections/e4.shtml (149 words)

	Lunar Republic : Craters
		His observations of the Moon, including the study of its craters, is considered a landmark work.
		The Lunar Republic, The Full Moon Atlas, The Lunar Consulate, The Lunar Registry and the phrases
		Lunar Republic, S.A. and the International Lunar Society.
	www.lunarrepublic.com /gazetteer/crater_p.shtml (335 words)

	East Valley Astronomy Club - EVAC Lunar Observing Program (Site not responding. Last check: 2007-11-07)
		This program is for everyone: deep sky observers waiting for dark skies, amateurs living in heavily light-polluted urban areas, the young, the old, the experienced observer, the novice...
		The craters are segregated according to their best viewing opportunity.
		One of the youngest of all lunar craters
	www.eastvalleyastronomy.org /lunar.html (684 words)

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