AL – Lunar II Observation David M. Douglass 2017-11-23 Tempe, Arizona

Total Page:16

File Type:pdf, Size:1020Kb

AL – Lunar II Observation David M. Douglass 2017-11-23 Tempe, Arizona AL – Lunar II Observation David M. Douglass 2017-11-23 Tempe, Arizona #063 Sinus Concordiae #066 Taruntius Rukl Map(s) #37 The image below is cropped from my image 578 taken 20171123 Day 5.0 https://en.wikipedia.org/wiki/Sinus_Concordiae Sinus Concordiae (Latin for "Bay of Harmony") is a bay (sinus) on the Moon that lies along the eastern edge of the Mare Tranquillitatis. Along its northern border is an area called the Palus Somni, while the southern border is an area of irregular terrain that contains the ruined crater Da Vinci. The selenographic coordinates of this bay are 10.8° N, 43.2° E, and it has an overall diameter of 142 km https://en.wikipedia.org/wiki/Taruntius_(crater) Taruntius is a lunar crater on the northwestern edge of Mare Fecunditatis and is named after Lucius Taruntius Firmanus. To the northwest is the lava- flooded crater Lawrence, to the north lie the craters Watts and da Vinci and southwest is the crater Secchi. The outer rim of Taruntius is shallow, but forms a veined, complex rampart in the nearby mare, especially to the north and southwest. The rim is broken in the northwest by the small crater Cameron. The inner rim face lacks terraces, but in the interior is an unusual concentric inner rim that is heavily worn and irregular. This is a floor-fractured crater, possibly created by an uplift of mare material from beneath the interior. There is a low central peak complex in the middle of the relatively flat interior floor. There are also some slender rilles that are concentric to the rim. The crater has a pair of faint dark patches. One patch is located just south of the central peak and the other falls on the sides of the northern rim near Cameron. These were likely created by deposits of volcanic ash from small vents. Taruntius has a ray system with a radius of over 300 kilometers. Due to these rays, Taruntius is mapped as part of the Copernican System.[1] .
Recommended publications
  • List of Targets for the Lunar II Observing Program (PDF File)
    Task or Task Description or Target Name Wood's Rükl Target LUNAR # 100 Atlas Catalog (chart) Create a sketch/map of the visible lunar surface: 1 Observe a Full Moon and sketch a large-scale (prominent features) L-1 map depicting the nearside; disk of visible surface should be drawn 2 at L-1 3 least 5-inches in diameter. Sketch itself should be created only by L-1 observing the Moon, but maps or guidebooks may be used when labeling sketched features. Label all maria, prominent craters, and major rays by the crater name they originated from. (Counts as 3 observations (OBSV): #1, #2 & #3) Observe these targets; provide brief descriptions: 4 Alpetragius 55 5 Arago 35 6 Arago Alpha & Arago Beta L-32 35 7 Aristarchus Plateau L-18 18 8 Baco L-55 74 9 Bailly L-37 71 10 Beer, Beer Catena & Feuillée 21 11 Bullialdus, Bullialdus A & Bullialdus B 53 12 Cassini, Cassini A & Cassini B 12 13 Cauchy, Cauchy Omega & Cauchy Tau L-48 36 14 Censorinus 47 15 Crüger 50 16 Dorsae Lister & Smirnov (A.K.A. Serpentine Ridge) L-33 24 17 Grimaldi Basin outer and inner rings L-36 39, etc. 18 Hainzel, Hainzel A & Hainzel C 63 19 Hercules, Hercules G, Hercules E 14 20 Hesiodus A L-81 54, 64 21 Hortensius dome field L-65 30 22 Julius Caesar 34 23 Kies 53 24 Kies Pi L-60 53 25 Lacus Mortis 14 26 Linne 23 27 Lamont L-53 35 28 Mairan 9 29 Mare Australe L-56 76 30 Mare Cognitum 42, etc.
    [Show full text]
  • Lunar II Logbook
    Astronomical League 1 Introduction and Disclaimer I made this logbook as a convenient place to keep my observations for the Astronomical League's Lunar II Club, and I offer it free of charge to the amateur astronomy community. Please note that although this logbook includes spaces for all of the required observations, it does not include all of the detailed instructions needed to complete the observations. It is intended as a supplement to the official Lunar II observing list, and not a replacement for it. The official observing list can be downloaded freely from the Astronomical League at http://www.astroleague.org/al/obsclubs/lunarII/lunarII1.html . I took the cover image by afocal projection using an Orion XT6 Dobsonian reflector and a Nikon Coolpix 4500 digital camera. It is likely that typos or other errors crept in while I was putting this together. If you find any, please let me know and I will correct them for future versions of this logbook. Clear skies, Mathew Wedel [email protected] Table of Contents and Master Checklist DTM pages refer to to pages in Discover the Moon by Jean Lacroux and Christian Legrand, published by Cambridge University Press. Obsv. # Target DTM Page Logbook Page [ ] OBSV 1-3 Full moon sketch 132 7 Describe these targets [ ] OBSV 4 Alpetragius 80 8 [ ] OBSV 5 Arago 62 [ ] OBSV 6 Arago Alpha & Arago Beta [ ] OBSV 7 Aristarchus Plateau 114 9 [ ] OBSV 8 Baco 68 [ ] OBSV 9 Bailly 128 [ ] OBSV 10 Beer, Beer Catena & Feuillée 84 10 [ ] OBSV 11 Bullialdus, Bullialdus A & Bullialdus B 94, 98 [ ] OBSV 12 Cassini,
    [Show full text]
  • Planetológiai Helyesírási Tanácsadó
    Planetológiai helyesírási tanácsadó GEOLÓGIA Kőzetrétegtani egységek ridged member = gerinces tagozat Heveliusi Formáció, Hold Geokronológia (idő) imbriumi időszak kora-imbriumi kor noachi időszak Kronosztratigráfia (időrétegtani)(kőzettestek) imbriumi rendszer alsó-imbriumi sorozat noachi rendszer Az egyes egységek magyar elnevezései MERKÚR kuiperi mansuri calorisi tolsztoji pretolsztoji VÉNUSZ aureliai atlai guinevrai ruszalkai laviniai sigrúni fortunai prefortunai HOLD kopernikuszi eratoszthenészi imbriumi nektári prenektári (procellárumi: elavult) MARS amazoni heszperiai noachi prenoachi MARS - geokémiai sideriki theiiki phylloci (ejtsd: filloszi) GEOGRÁFIA Bolygófelszíni alakzatok elnevezései Köznévi taggal (az alábbiakat mindig kötőjellel kapcsoljuk, kivéve birtokos esetben: Cassini-régió, de: Válságok tengere) Megjegyzések: • Az itt felsorolt alakok: latin alak egyes szám, többes szám [latin alak latinos kiejtése], magyar megfelelő • A ¯ jel az előtte álló u-n vagy e-n lévő vonalékezet • A toldalékok a (magyar vagy latin) nevekhez általában közvetlenül kapcsolódnak, a szükséges hasonulások vagy a szóvégi magánhangzó nyúlásának a jelölésével: Caloris Montesszal, Lavinia Planitián, Ión. • A két különírt tagból álló latin elnevezésekhez az -i/-beli képzô kötôjellel kapcsolódik; az eredeti kis- és nagybetûket megtartjuk: Caloris Planitia-i, Sinus Meridiani-beli stb. (vö. AkH. 1984: 217. b) pont). A két különírt tagból álló magyar elnevezéseknél az -i képzôs forma: Halál tavabeli, Méz tengerebeli, Rothadás mocsarabeli, Szivárvány öblebeli
    [Show full text]
  • The Isabel Williamson Lunar Observing Program
    The Isabel Williamson Lunar Observing Program by The RASC Observing Committee Revised Third Edition September 2015 © Copyright The Royal Astronomical Society of Canada. All Rights Reserved. TABLE OF CONTENTS FOR The Isabel Williamson Lunar Observing Program Foreword by David H. Levy vii Certificate Guidelines 1 Goals 1 Requirements 1 Program Organization 2 Equipment 2 Lunar Maps & Atlases 2 Resources 2 A Lunar Geographical Primer 3 Lunar History 3 Pre-Nectarian Era 3 Nectarian Era 3 Lower Imbrian Era 3 Upper Imbrian Era 3 Eratosthenian Era 3 Copernican Era 3 Inner Structure of the Moon 4 Crust 4 Lithosphere / Upper Mantle 4 Asthenosphere / Lower Mantle 4 Core 4 Lunar Surface Features 4 1. Impact Craters 4 Simple Craters 4 Intermediate Craters 4 Complex Craters 4 Basins 5 Secondary Craters 5 2. Main Crater Features 5 Rays 5 Ejecta Blankets 5 Central Peaks 5 Terraced Walls 5 ii Table of Contents 3. Volcanic Features 5 Domes 5 Rilles 5 Dark Mantling Materials 6 Caldera 6 4. Tectonic Features 6 Wrinkle Ridges 6 Faults or Rifts 6 Arcuate Rilles 6 Erosion & Destruction 6 Lunar Geographical Feature Names 7 Key to a Few Abbreviations Used 8 Libration 8 Observing Tips 8 Acknowledgements 9 Part One – Introducing the Moon 10 A – Lunar Phases and Orbital Motion 10 B – Major Basins (Maria) & Pickering Unaided Eye Scale 10 C – Ray System Extent 11 D – Crescent Moon Less than 24 Hours from New 11 E – Binocular & Unaided Eye Libration 11 Part Two – Main Observing List 12 1 – Mare Crisium – The “Sea of Cries” – 17.0 N, 70-50 E;
    [Show full text]
  • Javaslat a Planetológiai Nevezéktan Magyar Rendszerére
    HARGITAI HENRIK, KOZMA JUDIT, KERESZTURI ÁKOS, BÉRCZI SZANISZLÓ, DUTKÓ ANDRÁS, ILLÉS ERZSÉBET, KARÁTSON DÁVID, SIK ANDRÁS Javaslat a planetológiai nevezéktan magyar rendszerére Az elmúlt évtizedek során a bolygótani névanyag és szakszókincs egyre szélesebb körben terjedt el: már mindennaposnak számít, hogy akár napi- lapok hasábjain is feltûnnek. A szavak jelentôs részét angolból fordítják. A gyakorlatban az egyes neveket, szakszavakat különféleképpen fordítják – részint hozzá nem értés, részint különféle „iskolák” tudatos névhasználata miatt. Az ûrkutatás gyors fejlôdésével párhuzamosan mind szélesebb körben egyre gyakoribb használatuk várható a jövôben, ezért szükségesnek látjuk a nevek írásmódjának egységesítését, legalább ajánlásszinten. Az alábbi nevek és szakszavak megállapítását többéves elôzetes szakmai konzultáció elôzte meg az ELTE, MÁFI, MTA KTM CSKI, MCSE szakértôi részérôl. Ebben fi- gyelembe vettük a nemzetközi írásmódot és a magyar névhasználat hagyo- mányait is. Ahol nem jutottunk konszenzusra, azt külön jelezzük. Földrajzi nevek A Nemzetközi Csillagászati Unió bolygófelszíni nevekkel foglalkozó mun- kacsoportjának (IAU WGPSN: Working Group for Planetary System Nomencla- ture) alapelve szerint az idegen égitestek helynevei latinos formában írandók. Riccioli 1651-es Hold-térképén még latinul nevezte meg az alakzatokat, mert akkoriban a latin volt a nemzetközi tudomány nyelve. A 19. századra azon- ban már minden nemzet a maga nyelvén nevezte el az alakzatokat, és fordí- totta a hagyományos latin elnevezéseket. Akkor már az egyes szerzôk egyéni neveivel volt tele a Hold térképe. Az IAU 1935-ben tette hivatalossá „letisztí- tott” holdi nevezéktani listáját, még angol formában (például: „Carpathian Mts”). Az 1950-es években a Hold kutatása mind szélesebb közönséget fog- lalkoztatott, így egyre több helyen említették lefordítva a holdi helyneveket. A szovjet felfedezések nyomán születô új neveket az angol sajtó azonnal angol fordításban adta tovább.
    [Show full text]
  • Hungarian Localization of the International Planetary Nomenclature System
    3rd INTERNATIONAL CONFERENCE ON CARTOGRAPHY AND GIS 15-20 June, 2010, Nessebar, Bulgaria HUNGARIAN LOCALIZATION OF THE INTERNATIONAL PLANETARY NOMENCLATURE SYSTEM Henrik Hargitai Author: Henrik Hargitai Eötvös Loránd University, Institute of Geography and Earth Sciences, Planetary Science Research Group 1117 Budapest, Pázmány P st 1/1 hhargitai[at]gmail.com Abstract: The paper describes the Hungarian localization of the official IAU nomenclature system of planetary body surface features and planetary body names. The localized forms are recommended for use in texts published in popular science journals and newspapers and books for the general public. Keywords: planetary cartography, Mars, Moon, planetary nomenclature, placenames, toponymy INTRODUCTION The Planetary Nomenclature System is maintained by the Working Group for Planetary System Nomenclature (WGPSN) of the International Astronomical Union, and is published as the Gazetteer of Planetary Nomenclature which is distributed by the U.S. Geological Survey (USGS). Planetary surface feature Place Names consist of two elements: a specific term and a descriptor term. Crater, bright albedo and some other names have no descriptor term. Descriptor terms are in Latin language; for specifics, the original form is retained if the original is using Latin alphabet; if not, a transformation to Latin alphabet is applied. The origin of this system goes back to the 17th century, when the first Lunar maps, especially the Grimaldi-Riccioli map used Latin terms which was a conventional custom of cartographers
    [Show full text]
  • The Flint River Observer
    in Newton Co.); Thurs.-Fri., Feb. 1-2: Cox THE Field observings (at dark); Thurs.-Fri., Feb. 8- 9: Cox Field observings (at dark); Fri., Feb. FLINT RIVER 15: FRAC meeting (7:30 p.m., UGa-Griffin campus, Stuckey Bldg.); Wed., Feb. 20: OBSERVER public eclipse observing (7:45-whenever, front lawn, UGa-Griffin campus). Newsletter of the FLINT RIVER ASTRONOMY CLUB * * * (an affiliate of the Astronomical League) President’s Message. Recently I read a book Vol. 11, No. 12 February, 2008 titled North to the Orient, by Anne Morrow Officers: President/Alcor, Curt Cole; Vice Lindbergh, that reminded me that we‟re all President/Newsletter Editor: Bill Warren; explorers to some degree. This book was Secretary-Treasurer: Irene Cole; Board of about an exploratory trip to China in the Directors: Larry Higgins,Tom Danei and summer of 1931 by Anne and her famous Felix Luciano. husband Charles in a plane that they named Webmasters, David Ward and Tom Sirius, after the Dog Star of Canis Major. Moore; FRACgroups moderators: Steve Flying at night was not a common practice Knight and Tom Moore; Ga. Sky in those early years, but the Lindberghs did it View/Astronomy Day Coordinator, Steve occasionally, undoubtedly admiring the stars Knight; Observing Chairman/Public as they flew or camped in the dark skies of Observing Coordinator, Larry Higgins; Canada, Alaska, Japan and China. Once, Program Co-Chairmen: Larry Higgins and when darkness overtook them far from their Bill Warren; Publicity: Curt Cole; NASA day‟s destination, they had to land on an contact: Felix Luciano; and Event isolated lake at night and sleep in their float- Photographer, Tom Danei.
    [Show full text]
  • Moon Course Section 20-26 V1.0
    Around the Moon in 28 Days: Lunar Observing for Beginners Course Notes Section 20 - Lunar Day 15 Section 21 - Lunar Day 16 Section 22 - Lunar Day 17 Section 23 - Lunar Day 18 Section 24 - Lunar Day 19 Section 25 - Lunar Day 20 Section 26 - Lunar Day 21 (Last Quarter) Copyright © 2010 Mintaka Publishing Inc. Section 20 - Lunar Day 15 Tonight we'll begin a limb-to-limb lunar history adventure by learning about the Soviet probe, Lunik 9. In 1966, the unmanned lunar traveler became the first to achieve a soft landing on the Moon’s surface and successfully transmit photographs back to Earth. The lander weighed in at 99 kg, and had four outward opening antenna petals. Within five minutes of touchdown on January 31, the antennae sprang to life and the on-board television cameras began broadcasting the first panoramic images of the surface of another world – thus proving a lander would not simply sink into the lunar dust. Last contact with the spacecraft occurred just before midnight on February 6, 1966. If you'd like to see where Lunik 9’s remains stand, turn your binoculars or telescopes towards the western lunar limb for Oceanus Procellarum. On its western edge, you can easily identify the dark oval of crater Grimaldi. About one Grimaldi- length northward and on the western shore of Procellarum is where you will find Lunik 9’s resting place. Figure 20-1: The major features of the eastern part of the Moon on Day 15 Around the Moon in 28 Days: Lunar Observing for Beginners Figure 20-2: Image from the Luna 9 lander in February, 1966 in the Oceanus Procellarum Now let's go for the opposite limb to check out the eastern edge of Mare Crisium in a different relief.
    [Show full text]
  • Detailed Info About All Independently Observed Impact Candidates
    Lunar Impact Candidates Reported to the NASA Meteoroid Environment Office by Independent Observers NASA Meteoroid Environment Office (MEO) Last Updated: 1-Feb-2021 By: D. Moser, T. Clements INDEPENDENT OBSERVER REPORTS Eff. # of Peak Time Lunar Lunar video fields Peak Flash # Date (UT) (UT) Probable Type longitude latitude Region or frames brightness Aperture Camera Location Observers/Authors 1 23-Apr-2007 1:17:35 Lyrid 2 8” StellaCam II MD USA Varros 2 20-Oct-2007 23:17:03 Orionid 4 8” StellaCam II MD USA Varros 3 21-Oct-2007 3:48:12 Orionid 2 8” StellaCam II MD USA Varros 4 18-Dec-2007 0:38:31 Unk 3 8” StellaCam II MD USA Varros 5 21-Feb-2008 2:23:47 Unk 2 8” StellaCam II MD USA Varros 6 13-Apr-2008 1:42:59 Unk 2 8” Watec 902 H2 Ult MD USA Varros 7 13-Apr-2008 2:46:03 Unk 2 8” Watec 902 H2 Ult MD USA Varros 8 09-Aug-2008 2:27:05 Unk 3 8” Watec 902 H2 Ult MD USA Varros 9 09-Aug-2008 4:06:22 Unk 3 10” Supercircuits Pc-164ex CA USA Spellman 10 03-Jan-2009 0:26:22 Quadrantid -80.6 41.1 Lavoisier 5 8” Watec 902 H2 Ult MD USA Varros 13 03-Jan-2009 20:54:37 Quadrantid -40.2 5.5 Kepler 7 6" Mintron MTV12V1-EX Germany Gaehrken & Farago 4" Mintron MTV12V1-EX Germany 11 22-Oct-2009 2:08:45 Orionid 15.27 40.17 Alexander B 2 10” Supercircuits Pc-164ex CA USA Spellman 12 11-Feb-2011 20:36:58.4 Unk -88 16 Einstein 6 8.1 (V) 125 mm Watec 902 H2 Ult Switzerland Sposetti, Iten, & Lena 280 mm Watec 902 H2 Ult Switzerland 14 09-Apr-2011 20:52:44.7 Unk -45.1 -26.8 Mare Humorum, Liebig 3 8.4 (V) 125 mm Watec 902 H2 Ult Switzerland Lena, Iten, & Sposetti 280mm
    [Show full text]
  • Lunar Terminology 341
    Lunar Terminology 341 Lunar Terminology Are there still a few words associated with the Moon that you do not understand yet? Here is a simple glossary to help you along… Albedo – The amount of reflectiveness of a certain surface feature Anorthosite – Granular igneous rock usually of soda-lime feldspar Apogee – The point of the Moon’s orbit furthest from Earth – 406,700 km Basin – A large impact crater, with a diameter in excess of 100 km Breccia – Coarse, preexisting rock and angular fragments Caldera – Volcano summit depression formed by explosion or collapse Catena – Crater chain Cavus – Groups of hollows or irregular depressions Craters – Indentations that are bowl or saucer shaped in configuration; a depression with steep slopes on the surface; formed by impact or geologic activity Diurnal – A daily cycle Dorsum – ridge Ejecta – Impact crater material that is thrown clear of the source and covers the surface at least one crater diameter; streamers of material originating from a impact area Gibbous – Phase where more than half, but less than all, the Moon is illuminated Highlands – Densely cratered and higher elevated areas of the lunar surface Lacus – Small plain Lava – Volcanic rock present in mare areas; basalt flow Mare – The low surface reflectivity area filled with lava that covers the floors of older basins Mascon – Concentrations of mass on the lunar surface Mensa – Flat-topped ridges with cliff-like edges Mons – Mountain New – Phase during which the Moon is entirely in shadow Oceanus – A single, large dark area Palus – A small plain 342 Lunar Terminology Patera – A disfigured crater; complex with irregular edges Perigee – Point of lunar orbit closest to Earth – 356,400 km Planitia – A low plain Planum – A high plain Promontorium – A high point of land.
    [Show full text]
  • Lunar 1000 Challenge List
    LUNAR 1000 CHALLENGE A B C D E F G H I LUNAR PROGRAM BOOKLET LOG 1 LUNAR OBJECT LAT LONG OBJECTIVE RUKL DATE VIEWED BOOK PAGE NOTES 2 Abbot 5.6 54.8 37 3 Abel -34.6 85.8 69, IV Libration object 4 Abenezra -21.0 11.9 55 56 5 Abetti 19.9 27.7 24 6 Abulfeda -13.8 13.9 54 45 7 Acosta -5.6 60.1 49 8 Adams -31.9 68.2 69 9 Aepinus 88.0 -109.7 Libration object 10 Agatharchides -19.8 -30.9 113 52 11 Agrippa 4.1 10.5 61 34 12 Airy -18.1 5.7 63 55, 56 13 Al-Bakri 14.3 20.2 35 14 Albategnius -11.2 4.1 66 44, 45 15 Al-Biruni 17.9 92.5 III Libration object 16 Aldrin 1.4 22.1 44 35 17 Alexander 40.3 13.5 13 18 Alfraganus -5.4 19.0 46 19 Alhazen 15.9 71.8 27 20 Aliacensis -30.6 5.2 67 55, 65 21 Almanon -16.8 15.2 55 56 22 Al-Marrakushi -10.4 55.8 48 23 Alpetragius -16.0 -4.5 74 55 24 Alphonsus -13.4 -2.8 75 44, 55 25 Ameghino 3.3 57.0 38 26 Ammonius -8.5 -0.8 75 44 27 Amontons -5.3 46.8 48 28 Amundsen -84.5 82.8 73, 74, V Libration object 29 Anaxagoras 73.4 -10.1 76 4 30 Anaximander 66.9 -51.3 2 31 Anaximenes 72.5 -44.5 3 32 Andel -10.4 12.4 45 33 Andersson -49.7 -95.3 VI Libration object 34 Angstrom 29.9 -41.6 19 35 Ansgarius -12.7 79.7 49, IV Libration object 36 Anuchin -49.0 101.3 V Libration object 37 Anville 1.9 49.5 37 38 Apianus -26.9 7.9 55 56 39 Apollonius 4.5 61.1 2 38 40 Arago 6.2 21.4 44 35 41 Aratus 23.6 4.5 22 42 Archimedes 29.7 -4.0 78 22, 12 43 Archytas 58.7 5.0 76 4 44 Argelander -16.5 5.8 63 56 45 Ariadaeus 4.6 17.3 35 46 Aristarchus 23.7 -47.4 122 18 47 Aristillus 33.9 1.2 69 12 48 Aristoteles 50.2 17.4 48 5 49 Armstrong 1.4 25.0 44
    [Show full text]
  • Estudio Y Observacion Del Mare Tranquillitatis
    ESTUDIO Y OBSERVACIÓN DEL MARE TRANQUILLITATIS Grupo de Estudios Lunares “Enrique Silva” PLAN Y NOTAS PARA LA OBSERVACIÓN DEL MARE TRANQUILLITATIS 1.- Introducción. La “Llamada a Observación” difundida por TLO en su número de Mayo de 2015, ponía el foco en el “ Mare Tranquillitatis, incluyendo su superficie y bordes1”. Los miembros del Grupo de Estudios Lunares “Enrique Silva” de la AAM, decidimos tomar cartas en este asunto. El estudio y las observaciones que siguen constituyen nuestra aportación para la AAM, de la cual se remitirá un informe más escueto a los convocantes de la observación. Abordaremos el estudio utilizando fotografías de baja resolución y reservaremos las de alto detalle para documentar nuestras observaciones telescópicas. Para hacer la lectura más fluida hemos concentrado todos los datos numéricos en el apéndice de datos situado al final. Foto 1A.- Situación del Mare Tranquillitatis. La cuenca del Mare Tranquillitatis (foto de la portada y foto 1) es una llanura ovalada que mide 837 Km de diámetro y abarca una superficie de 421.000 Km 2. Se halla centrada sobre el paralelo selenográfico 9º N y el meridiano selenográfico 27º E. Dentro de ella, la lava surgida hace tres mil millones de años rellenó toda la oquedad, formando una llanura magmática que constituye propiamente el llamado Mare Tranquillitatis. Pero conviene remarcar que existe una distinción de unos mil millones de años en tiempo, entre la formación de la cuenca (en el Período Prenectárico) y la del mare (en el Período Ímbrico Superior) para no caer en el error tan común de confundir los maria con sus cuencas.
    [Show full text]