| Piú viste - The Moon After Apollo 17 |
ZZ-Tycho and Copernicus.jpgTycho and Copernicus Crater121 visiteCaption NASA originale:"Dazzling in binoculars or a small telescope, the Moon is pocked with impact craters. During partial lunar phases, the craters along the terminator are cast in dramatic relief by strong shadows. But when the Moon is full, some craters seem to sprout systems of bright radial lines or rays. This detailed close-up of the full Moon features two prominent ray craters, Copernicus (upper left) and Tycho (lower right), each with extensive ray systems of light colored debris blasted out by the crater-forming impacts. In general, ray craters are relatively young as their rays overlay the lunar terrain. In fact, at 85 Km wide, Tycho, with its far reaching rays, is the youngest large crater on the nearside. Crater Copernicus, surrounded by dark mare which contrast nicely with its bright rays, is 93 Km in diameter".
|
|
E-RupesRecta.jpgRupes Recta121 visitenessun commento
|
|
ClaviusCrater.jpgClavius117 visitenessun commento
|
|
C-La Condamine Crater 02.jpgRays of light through "La Condamine Crater" (3)116 visitenessun commento
|
|
Moon Eclypse 2004.3.jpgMoon's eclypse - October 2004 (3)115 visiteImmagine amatoriale, ma di ottima qualità, dell'eclissi dell'Ottobre 2004. La ripresa proviene da Tacoma (Washington - USA). L'Autore della ripresa si è nascosto dietro il nick-name di KBoard. Si tratta forse di un pianista, oltre che di un astro-fotografo di indubbie qualità?!?
|
|
Clavius-7.jpgClavius (4)115 visiteLa Regione di Clavius in piena luce: notate come questa immagine - pur restando molto bella - perda di "profondità" rispetto alle precedenti.
|
|
ZZ-ZZ-ZZ-FQ-BrightAristarchus.gifAristarchus: the TLPs "Hottest Spot" (2)114 visiteEcco come appare Aristarco in una (secondo noi eccellente, a dispetto dell'apparenza un pò sfuocata) ripresa da Terra.
Original caption:"Photograph shown here was taken using a 12.5 F 5 Newtonian reflector, with 12.5mm eyepiece and 2x Barlow. Using digital still camera DSC-P71 mounted for eyepiece projection. The photograph was taken on April 3. 2004 at 1:20 U.T.".
|
|
C-La Condamine Crater 06.jpgRays of light through "La Condamine Crater" (5)112 visiteCharles-Marie La Condamine studied at the Jesuit College of Louis-le-Grand in Paris. There he was taught mathematics by Père Louis Castel. On leaving the College he decided to take up a military career and, when war broke out with Spain he joined the army. He distinguished himself with his bravery at the siege of Rosas in 1719 but decided that army life did not suit him.
At this point La Condamine made contact with scientists in Paris and became a member of the Académie Royale des Sciences in 1730. The quiet life in Paris did not suit him either and he sailed on a voyage to Algiers, Alexandria, Palestine, Cyprus and Constantinople (now Istanbul) where he spent five months. On his return to Paris he published mathematical and physical observations of his voyage.
The Académie Royale was impressed and sent him on an expedition to Peru. In April 1735 La Condamine set out on the expedition to Peru to measure the length of a degree of meridian at the equator. Bouguer was a member of the same expedition and its third scientific member was the leader of the expedition Louis Godin. The three finished their journey by different routes, La Condamine going overland from Manta, the other two sailing to Quito where they joined up.
The three were soon involved in disagreements. Godin began to work on his own while La Condamine worked with Bouguer. In 1741 Bouguer discovered a small error in their joint measurements and these two fell out when Bouguer refused to allow La Condamine to recheck the results. All three made independent measurements, the work being completed in 1743. The three returned by different routes.
In 1743 La Condamine began his return journey which included a four month raft journey down the Amazon river. His was the first scientific account of the Amazon which he published as Journal du voyage fait par ordre du roi a l'équateur (1751).
La Condamine spent five months in Cayenne on his journey home and here he repeated Richer's experiments on the variation of weights at different latitudes.
By February 1745 La Condamine was back in Paris after his ten year journey. He returned with many notes, 200 natural history specimens and works of art which he gave to Buffon. Y Laissus writing in the Dictionary of Scientific Biography says:-
The last survivor of the expedition, La Condamine, who was a less gifted astronomer than Godin and a less reliable mathematician than Bouguer often received the major part of the credit, probably because of his amiable nature and his talent as a writer.
La Condamine was a close friend of Maupertuis for many years. He spent much effort in the last part of his life campaigning for inoculation against small-pox. His passion on this topic was partly due to the fact that he had suffered from small-pox as a child.
|
|
ZZ-ZZ-ZZ-FN-Earthshine.gifCoronal Mass Ejection and Earthsine111 visiteThis photograph was taken by Devgun Chander of Sohna, Haryana, of India. It shows a striking clarity to the earthshine region of the Moon. When I first look at the photograph I was impressed that Aristarchus was standing out so bright even though it very close to the sunset terminator. I sent the photograph to Dr. Anthony Cook the senior recorder for the L.T.P. sections of BAA and ALPO. He sent me the measured brightness of specific lunar formations and of the Lunar Maria.
(...) The Maria across the face of the Moon is uniformly bright except for the formations Mare Humorum, Mare Frigoris and Maria located near Aristarchus. Dr. Anthony Cook believes they are brighter due to the glare from the nearby sunset terminator. (...) The fact that we had a significant coronal mass ejections into space or CME take place on November 8-9,2004 causing aurora reports all over the World. If Solar Excitation is a factor for the extreme brightness of the Earthshine this would be the event to cause it.
|
|
ZZ-Near Moon, Far Moon (2).jpgNear Moon, far Moon (2)110 visitePer meglio apprezzare la sensibile differenza di diametro apparente che caratterizza la Luna in queste due fasi del suo ciclo, Vi precisiamo che le 5 istantanee che la ritraggono sono state tutte quante riprese impiegando lo stesso telescopio, il medesimo ingrandimento e la stessa fotocamera.
|
|
ZZ-Near Moon, Far Moon (5).jpgNear Moon, far Moon (5)110 visitenessun commento
|
|
Kane Crater - Light Ray (2).jpgLight rays inside Kane Crater (2)110 visiteUn commento si impone: il lavoro dell'Amico Robert Spellman è davvero notevole e, a dispetto di seeings talvolta scadenti, la qualità delle sue immagini è sempre elevata.
Anche la mappatura delle Regioni Lunari fotografate è buona.
In questo caso specifico, tuttavia, ci sembra giusto sottolineare che il rilievo chiaro che lui ha evidenziato e qualificato come "raggio di luce", a nostro parere potrebbe non essere affatto un raggio di luce in senso tecnico (e cioè un certo quantitativo di luce solare - radente, dal punto di vista della Regione Lunare coinvolta - che filtra attraverso uno o più cracks che si aprono sul bordo (rim) di un cratere e ne illuminano il fondo).
|
|
| 165 immagini su 14 pagina(e) |
 |
|
|
|
|
8 | |
|
|
|
|
