Durakwir 10 Posted July 5, 2015 Partager Posted July 5, 2015 exact durakwir...merci pour la précision Salut PAX, un sujet qui m'a toujours passione, Merci pour avoir poste cet important discours de Kennedy, le president est une inspiration pour les gens qui tiennent a coeur leurs pays. Il avait meme propose a Khrushchev de faire le trajet lunaire ensemble, mais les belligerents des deux cotes en avaient decide autrement ... Citer Link to post Share on other sites
Guest George Bish Posted July 5, 2015 Partager Posted July 5, 2015 Certes les russes avaient pris de l'avance (concernant le programme spatial) sur les americains au depart, mais les americains etaient mieux organises, plus motives, et surtout etaient plus en avance technologiquement (et bien sur avaient beaucoup plus d'argent), la preuve aujourd'hui ils sont aux quatres (six peut etre :D) coins du Syteme Solaire! Les russes avaient commis beaucoup de betises tant sur le plan tecchnologique que sur le plan organisationel, ce qui leur a coute ... la Lune! Les americains ont eux aussi procede par etapes , le programme Apollo, avait ete precede par le programme Mercury, puis Gemini dans le but de developper les technologies et concepts afin de concretiser l'objectif Lune. Pour ce qui est de la discretion, ce sont plutot les russes qui avaient tenu secret leur programme lunaire, et nie en avoir un, jusqu'a ce que cela soit divulgue apres l'effondrement de l'URSS... Salut dur a cuire :D merci pour ces precisions sinon, je voudrais profiter de ce sujet, peut etre tu pourras m apporter conseils. je cherche a acquerir un telescope, des marques ? des propositions ?? budget : 300-400 $ Citer Link to post Share on other sites
PAX 10 Posted July 5, 2015 Partager Posted July 5, 2015 Bish...regarde ici...tu peux classer par prix ..par avis d'utilisateurs.... telescope sur idealo.fr Citer Link to post Share on other sites
Malfurion 10 Posted July 5, 2015 Partager Posted July 5, 2015 Il est triste de voir qu'il y ait encore des gens qui doutent de la veracite de l'alunissage alors que les americains sont partout dans le systeme solaire... et que dans quelques jours une de leurs sondes va nous envoyer des close up de Pluton! Comme c'est triste d'avoir un doute sur une nation dont on sait qu'elle utilise le mensonge pour arriver à ses fins. Citer Link to post Share on other sites
Durakwir 10 Posted July 6, 2015 Partager Posted July 6, 2015 Salut dur a cuire :D merci pour ces precisions sinon, je voudrais profiter de ce sujet, peut etre tu pourras m apporter conseils. je cherche a acquerir un telescope, des marques ? des propositions ?? budget : 300-400 $ Je suis dans la meme situation que toi, je ne saurais pas quoi choisir si je devais acheter un telescope :confused: Pourquoi pas un fil sur le comment choisir son telescope et y mettre des liens sur des articles et videos traitant du sujet? Citer Link to post Share on other sites
Durakwir 10 Posted July 6, 2015 Partager Posted July 6, 2015 Comme c'est triste d'avoir un doute sur une nation dont on sait qu'elle utilise le mensonge pour arriver à ses fins. :39: ... Pendant ce temps l'Inde envoie des sondes vers Mars, la Chine va bientot envoyer des hommes sur la Lune, et dans quelques jours l'on va avoir les premieres images rapprochees de Pluton envoyees par une sonde ... americaine! Citer Link to post Share on other sites
Guest padawan Posted July 6, 2015 Partager Posted July 6, 2015 Bish essaies de le fabriquer toi même ton télescope... Une base en Optique géométrique, de l'aide d'un expert verrier pour le polissage des lentilles... et un peu d'entraide sur les forums... :p Citer Link to post Share on other sites
PAX 10 Posted July 6, 2015 Partager Posted July 6, 2015 quand j’étais étudiant j'avais 1 copain passionné d'astronomie qui fabriquait ses lentilles...il avait acheté 2 cylindres de verre ( 30 cm de diamètre)qu'il polissait lui même...un boulot de fou....je me demande s'il a fini à l'heure qu'il est... il les frottait de manière circulaire l'un contre l'autre...il fallait que la concavité de l'un soit le reflet exact de la convexité de l'autre... 1 à 2 heures tous les soirs.... Citer Link to post Share on other sites
Guest Serena1 Posted July 6, 2015 Partager Posted July 6, 2015 :39: ... Pendant ce temps l'Inde envoie des sondes vers Mars, la Chine va bientot envoyer des hommes sur la Lune, et dans quelques jours l'on va avoir les premieres images rapprochees de Pluton envoyees par une sonde ... americaine! well said! J'aime bien les points de suspension. Citer Link to post Share on other sites
Guest Serena1 Posted July 6, 2015 Partager Posted July 6, 2015 Comme c'est triste d'avoir un doute sur une nation dont on sait qu'elle utilise le mensonge pour arriver à ses fins. le triste c'est toi. Quand ne sais pas...on demande..... on ecoute...on apprend. Citer Link to post Share on other sites
Malfurion 10 Posted July 6, 2015 Partager Posted July 6, 2015 le triste c'est toi. Quand ne sais pas...on demande..... on ecoute...on apprend. si je te demande tu vas me dire que ce sont les arabes qui sont allé sur la lune :mdr: Citer Link to post Share on other sites
Durakwir 10 Posted July 7, 2015 Partager Posted July 7, 2015 well said! J'aime bien les points de suspension. Thanks! Avec les points de suspension, j'avais espoir de bousculer l'esprit de Malfurion ... En vain :D Citer Link to post Share on other sites
Gassem 10 Posted July 7, 2015 Partager Posted July 7, 2015 doublon Citer Link to post Share on other sites
Gassem 10 Posted July 7, 2015 Partager Posted July 7, 2015 ....................... Citer Link to post Share on other sites
Gassem 10 Posted July 7, 2015 Partager Posted July 7, 2015 on etait la un petit groupe en juillet 69 dans un foyer de jeune devant une télé noir et blanc ...ayant veillé assez tard ..pour regarder en direct cet evenement .. mon sentiment a l'epoque ....je me sentais faire partie d'une humanité a la conquete des etoiles ..... j'avais 17 ans le meme age qui m'avait vu abondonner les illusions que provoquait la religion .....cela a du renforcer chez moi cette curiosité pour la decouverte et les sciences en general... on fremissait deja au exploit es spoutnik des garagarine et de la petite laika ....... .. Oui et t'es né en 1949 ...Finalement tout le monde peut atteindre la lune Citer Link to post Share on other sites
trinita 2 670 Posted July 7, 2015 Partager Posted July 7, 2015 la gravitation y est environ 6 fois plus faible que sur la terre ....donc loin d'etre nulle.... Si elle 6 donc le poids de la poussiere sera 6 x moins lourds alors que le sable aparame't mis dans le studio est plus lourds..:mdr::mdr: L'astronaute doit peser avec l'equipement 80/6=14kg c'est le poid d'un enfant,..il doit courir sur la lune et non sauté et meme son saut sera de plusieurs metres en avant.. Ils nous prennent pour des con ces réalisateurs Le film the movie ''One day on the moon'' Staring neil amsteong Directed by Mac Imbecile Citer Link to post Share on other sites
PAX 10 Posted July 7, 2015 Partager Posted July 7, 2015 trinita....avant tu croyais qu'il y avait l'apesanteur sur la lune...maintenant tu continues avec d'autres sornettes... Arrette un peu...reprend ton souffle et instruit toi... un indice supplémentaire pour te faire avancer dans ta réflexion: il n'y a pas d’atmosphère ...c'est elle qui ralentit considérablement la chute des corps sur le terre...et qui empêche le kilo de plume de tomber aussi vite que le kilo de plomb..... sur la lune malgré la gravitation 6 fois plus faible la poussière ne retombe pas 6 fois moins vite que sur la terre.. Pour tes astronautes qui devraient courir ...je te laisse réfléchir... C'est marrant tes ricanements...tu ris de ton ignorance ? Citer Link to post Share on other sites
Guest Serena1 Posted July 7, 2015 Partager Posted July 7, 2015 Je n'ai pas compris...:rolleyes: Pourquoi ils doivent courir sur la lune au lieu de marcher?:D Citer Link to post Share on other sites
Guest Serena1 Posted July 7, 2015 Partager Posted July 7, 2015 Interessant [YOUTUBE]Zj5r3jXhV2Q[/YOUTUBE] Citer Link to post Share on other sites
Guest Serena1 Posted July 7, 2015 Partager Posted July 7, 2015 Neil Armstrong: A Rare Interview 2011 [YOUTUBE]t57KgcnQQaQ[/YOUTUBE] regardez la demonstration vers la fin a partir de 35:27 min. Citer Link to post Share on other sites
Guest Serena1 Posted July 7, 2015 Partager Posted July 7, 2015 Tu te moques de nous? si je te demande tu vas me dire que ce sont les arabes qui sont allé sur la lune :mdr: اقرأ اقرأ باسم ربك الذي خلق Quand une nation est [[[cree]]] et l'essence de son existence est basee sur le principe du savoir et propager le savoir...je trouve que tes remarque et tes rires sont bien deplaces...je dirai meme un peu RACISTES. LEARN! During the period when Western civilization was experiencing the dark ages, between 700-1200 A.D., an Islamic empire stretched from Central Asia to southern Europe. Scholarly learning was highly prized by the people, and they contributed greatly to science and mathematics Arab Astronomy and Navigation Astronomy Muslim scholars made significant contributions towards the development of many ‘modern’ sciences, such as physics, chemistry, medicine, mathematics and astronomy. They were particularly interested in the latter. Using the work of the second century Greek astronomer Ptolemy as a basis, Muslim thinkers greatly increased man’s knowledge of astronomy. Indeed, during the Middle Ages, when European science underwent a decline, it was the Arabs who preserved the astronomical heritage. In some respects this achievement may have been inevitable, since knowledge of the stars was essential for navigational purposes and for telling the times of prayers and religious festivals. In other words, being adventurous traders and mariners and temporally precise worshippers, the Arabs needed to study astronomy other than for its purely scientific interest, though undoubtedly such an interest existed. Consequently they constructed many observatories and improved certain measuring instruments such as the astrolabe for determining and recording the positions and movements of celestial bodies. Foremost amongst early Arab scientists was al Khawarzimi, who lived in Baghdad during the ninth century. His work was mainly concerned with astronomy and mathematics. In fact, his mathematical treatise was the first to employ what westerners term ‘Arabic numerals’ (which were really borrowed from the Indians, as explained earlier. Although it seems most likely that the Indians invented the zero symbol or cipher (‘sifr’ means empty in Arabic), al Khwarzimi is attributed with greatly developing its use n mathematics to simplify multiplication and division. He also gave a systematic account of algebra and geometry, for use in solving practical astronomical and navigational problems. Other notable Arab astronomers were al Battam (d. 929), al Zarquli (d. 1087) and Omar al Khayyami (d. 1123). The latter was a Persian mathematician who devised a very accurate calendar based on astronomical observations. It was reputed to have been more accurate than the Gregorian one we use today, with an error factor of only one day in 3770, rather than the Gregorian’s one in 33303. Incidentally, the mathematics used for astronomical calculations by the Arabs involved the use of degrees and minutes of arc-first developed by the Sumerians, and later developed extensively by the Babylonians, millennia earlier. The direct expansion and inclusion of this system into Euclidean geometry is the main reason why we measure angles in degrees, minutes and seconds nowadays (not to mention basing our system of measuring time upon it also). Arab interest in astronomy was also continued in Moghul India, where massive observatories were built in Jaipur, for example. It is interesting to consider that some modern historians think that the writings of the great Copernicus (who was the first westerner to propose an heliocentric planetary system) show much that could be attributable to these early Muslim astronomers. Navigation When the first Portuguese navigators, like Vasco da Gama, sailed along the East African coast and around the Arabian Peninsula they encountered a well-established Arab seafaring tradition, utilizing an advanced navigational science dating from the eighth century. Techniques used were basically simple, but never the less by the eleventh century Arab mariners had adapted the Chinese discovery of the magnetic properties of lodestone for use as a compass at sea. Earlier methods had relied on steering by Polaris, the ‘North’ star, and ‘Kamal’, a kind of simple astrolabe used to reckon relative latitude. In fact, it is believed that Europeans first acquired a knowledge of the magnetic compass and the astrolabe (later to become the sextant) from Muslim sailors. The renowned Arab navigator Shihab al Ahmed bin Majid al Najdi (c.1500), at the height of Arab navigational prowess, wrote a masterpiece entitled “the Book of Profitable Things concerning the First Principles and Rules of Navigation” which featured much astronomical observational data, amongst other things nautical. Part of the legacy of this period include the fact that many of the brightest stars still bear Arabic names, allocated to them by Arab astronomers and navigators, for example Betelgeuse, Deneb, Aldebaran and Altair. These names, along with numerous other facets of Arab scientific nomenclature and mathematics, passed into Europe during the Renaissance. However, this period, marked by the ‘collision’ of two great maritime powers – the European and the Arabian – was the beginning of the era of European ascendancy and the decline of Arab commercial dominance in Middle Eastern and Oriental seas. Citer Link to post Share on other sites
Guest Serena1 Posted July 7, 2015 Partager Posted July 7, 2015 The Arabs, although a fierce, conquering race in the historical context, were also intellectually curious. Unlike the illiterate and destructive Aryans who besieged the ailing Roman Empire, Muslim scholars preserved, translated and developed the philosophical and scientific legacy of the ancient classical world. Later the salvation of Arab literature, especially of philosophic and scientific works, by Renaissance scholars during the decline of Islam in Europe and the East, was remarkably fortuitous, though perhaps inevitable. The ’rebirth’ of European scientific perception and application rescued much relevant literature from the rapidly retreating boundaries of the perceived Muslim empire, whose libraries in satellite university cities, such as Cordova in Spain, were being pillaged (or ignominiously burnt) by advancing Christians in the west and Mongols in the east. Subsequently, from the ‘ashes’ of medieval Arab scientific dominance, there arose a new tree of knowledge, spreading its roots and branches throughout Renaissance Europe. A wind of change then blew through its literary leaves, an element conceived within the mind of enlightenment, despite repression and persecution by fanatical theological dogmatism. Thus the era of medieval natural philosophy pioneered by Islam yielded to the incipience of Renaissance European thought, at which point in the historical continuum I conclude. It remains only for me to suggest, subjectively at least, that the scientific contributions made by medieval Islam were undoubtedly significant ones, and that the inclusion of astronomical investigation within that wide spectrum was, in retrospect, something more than just a useful by-product of practical requirements. Rather, Muslim intellectualism provided an essential link between Classical and Renaissance achievement, which led ultimately to the development of lucid contemporary theories. ................ Citer Link to post Share on other sites
ouarseniss-02 319 Posted July 9, 2015 Partager Posted July 9, 2015 Poutine a menacé de déclassifier 2 archives qui font peur aux américano-sionistes : 1) La légende sur les "premiers pas" de l'homme (américain bien sûr) sur la lune.Une fumisterie il parait. 2) La libération des "camps" de concentration car les russes ont tout vu puisque ce sont eux qui ont libéré ces "camps" de concentration.La shoa "buzness" prendra un coup. :mdr: :mdr: Citer Link to post Share on other sites
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