Diametre de la terre en km

Présentation à sujet: "Les planètes du système solaire: Mercure"— Transcription aux la présentation:


1 Les planètes aux système solaire: Mercure

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2 MERCURE P.125 Masse: 3,3E23 kg diamètres 4878 km Densité: 5,42 kg/dm3Distance venir soleil: millions kilomètre Jour: 58.6 jours T.

Vous lisez ce: Diametre de la terre en km

Année: 87.9 jour Inclinaison de l’axe: 0 T. Moy. Surface: 179C Atmosphère: piste Pas aux satellites P.125
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le3 Mercure et les Terre, à l’échelleP.125

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4 MERCURE Masse: 5,5% earths Rayon: 38% TerreDistance à soleil: % terrestre

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5 MERCURE Particularités: 1ère planète jusqu’à partir ns soleilChamp magnétisme 1%T Mercure faisaient un la tour et demi sur lui-même durant son orbite super noyau métallique Température du surface variant du 427C le jour à -173 C la corrébration Plus petite que les reconnaissance grosses lunes aux Jupiter und Saturne

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6 L’INTÉRIEUR aux MERCUREManteau und surface aux roche et/ou aux silicates Noyau métallique aux fer et ns Nickel P.125

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7 100 km

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8 Surface grandement cratérisée.25 kilomètre

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9 bol Caloris P.127

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10 Fosses parce que le surface: signe de rétrécissement

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11 signe de rétrécissementFosses for surface: signe aux rétrécissement oui the MESSENGER team continues to study auto high-resolution images taken during the mercury flyby encounter nous January 14, 2008, scarps (cliffs) the extend for long distances are discovered. This frame, taken by the Narrow angle Camera (NAC) of the mercure Dual Imaging system (MDIS), shows a region of Mercury"s région previously unseen by spacecraft et a large scarp traversée vertically through thé scene, on the frais right of the image. This scarp is thé northern continuez of the une seen in auto NAC image released on January 16. Thé width of this image is around 200 kilometers (about 125 miles), mirroring that this scarps deserve to be hundreds du kilometers longue on Mercury. Auto presence de many long et high scarps, as discovered from des photos from thé Mariner 10 ordre in 1974 et 1975, says a history pour Mercury that is unequal that du any du the divers planets in the solar system. These huge scarps are believed to have formed once Mercury’s interior cooled et the whole planet shrank slightly oui a result. However, Mariner 10 was able à view much less than half auto planet, so the global extent ns these scarps has actually been unknown. MESSENGER images, choose this one, are giving the tons high-resolution watch at countless areas conditions météorologiques Mercury"s surface, and science team members room busy mapping this newly discovered scarps à see even if it is they are usual everywhere nous the planet. Mission Elapsed time (MET) of image: Credit: NASA/Johns Hopkins University used Physics Laboratory/Carnegie institution of Washington

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12 Départ ns la exploration Mariner 10: 10 novembre 1973EXPLORATION: Départ du la sonde Mariner 10: 10 novembre 1973 Résultats: photos ns Vénus et du Mercure

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13 Sonde Mariner 10: constructionP.126

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14 Mariner 10

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15 MErcury Surface, room ENvironment, GEochemistry and RangingMESSENGER mercure Surface, room ENvironment, GEochemistry and Ranging

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16 Lancement aux la exploration MESSENGER, 3 août 2004

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17 Gros destinées pris par la recherche MESSENGERAs MESSENGER sped par Mercury conditions météorologiques January 14, 2008, the Narrow angle Camera (NAC) du the mercure Dual Imaging system (MDIS) captured this image avant its closest strategy with the planet. The scene is close to Mercury"s terminator (the line between the sunlit job side and dark night side de the planet), wherein shadows room long et height distinctions accentuated, revealing increasing crater walls that tower over thé floors below. The super crater situated nous the right à côté de in the bottom half du the d’image is Sullivan crater, a structurellement about 135 kilometers (84 miles) in diameter likewise seen during auto Mariner 10 mission. An influential American architect, louis Sullivan et his work-related are often associated with auto rise du modern skyscrapers, et this crater called in his le respect finds a fitting patrie in Mercury"s ancient geological architecture. Commander Elapsed temps (MET) ns image: Credit: NASA/Johns Hopkins University used Physics Laboratory/Carnegie institution of Washington

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18 Gros destinées pris moyennant la dexploration MESSENGERTwo main ago, conditions météorologiques January 14, 2008, MESSENGER came to be the sapin spacecraft to see the page of mercure shown in this image. The first image transmitted back to earth following thé flyby ns Mercury, and then released to auto web within hours, spectacles the historic life look at the previously unseen side. This image, taken by the Wide angle Camera (WAC) de the mercury Dual Imaging système (MDIS), spectacles a closer view ns much of that territory. Seulement above et to auto left of centre of this photo is a small crater with a express set of bright light ray extending across Mercury"s surface away from auto crater. Shining rays space commonly fabriquer in a crater-forming exploser when année asteroid strikes the surface of an airless body like the Moon or Mercury. But rays légère with time ont tiny meteoroids et particles from the solar wind strike auto surface and darken auto rays. Auto prominence ns these rays means that the small crater at the center of the ray pattern created comparatively recently. This image is one in a plan set ns 99. Nine different views of mercury were snap in this set to create a mosaic sample with images in 3 rows and 3 columns. Thé WAC is equipped v 11 narrow-band color filters, and each ns the 9 various views was obtained through toutes les personnes 11 filters. This la peinture was bring away in filter 7, which is sensitive to light close to the rouge end ns the visible spectrum (750 nm), et shows features oui small as about 6 kilometers (4 miles) in size. Auto MESSENGER team is examining this previously unseen côté of mercure in detail à map and identify nouveau geologic features and to construct auto planet’s geological history. Commander Elapsed temps (MET) of image: Credit: NASA/Johns Hopkins University applied Physics Laboratory/Carnegie institution of Washington

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19 Le nord du Mercure orient moins cratérisé que les sud…As MESSENGER sped de Mercury on January 14, 2008, auto Narrow angevin Camera (NAC) of the mercure Dual Imaging système (MDIS) caught this shot looking towards Mercury"s phibìc pole. The surface shown in this d’image is from the côté of mercure not previously seen by spacecraft. Thé top right ns this photo shows thé limb of the planet, i m sorry transitions into the terminator (the heat between the sunlit, day side et the dark, night side) conditions météorologiques the dessus left of the image. Near auto terminator, thé Sun illuminates région features at a meugler angle, casting longue shadows et causing height differences ns the région to appear more prominent in this region. It is amazing to comparer MESSENGER"s view to thé north with the la peinture looking toward auto south pole, released on January 21. Compare these deux images, ce can be seen that the action near the south pole is much more heavily cratered while some de the an ar near thé north pole spectacle less cratered, smooth levels material, regular with the aperçu observations ns the poles made by Mariner 10. MESSENGER acquired over 1200 images of Mercury"s région during that is flyby, et the MESSENGER team is liven examining all of those images in detail, à understand thé geologic history de the planet oui a whole, native pole to pole. This la peinture was acquired around 94 minute after MESSENGER"s closestly approach to Mercury, when thé spacecraft to be at a distance of around 32,000 kilometers (20,000 miles). Ordre Elapsed time (MET) de image: >br /> Credit: NASA/Johns Hopkins University applied Physics Laboratory/Carnegie organisation of Washington

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br /> Credit: NASA/Johns Hopkins University used Physics Laboratory/Carnegie agence of Washington.">

20 Gros destinées pris moyennant la dexploration MESSENGERDuring MESSENGER"s flyby of mercury on January 14, 2008, part ns the planned sequence of observations included taking image of thé same morceaux of Mercury"s région from five different viewing angles. The first view native this sequence to be taken seul after MESSENGER fabriqué its closest approach venir Mercury, from a low viewing angle; an image du the tons view was released nous January 19. The photo released here, acquired with auto Wide angevin Camera (WAC) nous the mercure Dual Imaging system (MDIS), was snapped 13 protocole after MESSENGER"s closest method with Mercury. Auto lower two-thirds ns this la peinture shows much of the same travail seen in the tons view, cible from a much greater viewing angle, oui the spacecraft started to pass nearly overhead. At thé time du this image, MESSENGER was at a supprimer of around 3000 kilometers (about 2000 miles) from Mercury. A comparison de the image taken at different viewing angle provides significativement information about auto properties ns the products that comprise Mercury"s surface. In addition, each see was take away through tous 11 de the WAC"s narrow-band shade filters. The la peinture shown below is from filter 7, i m sorry is sensitive à light close to the red end of the visible spectrum (750 nm). Auto MESSENGER team is working to compare these images taken from different perspectives et in different couleurs to understand région properties conditions météorologiques Mercury. In addition, knowledge du the variation of d’image properties with viewing angle in this region will permit a more confident to compare of images of divers portions du the surface taken at different illumination and viewing angles. This image is around 1000 kilometers (about 600 miles) across. Image mission Elapsed temps (MET): Credit: NASA/Johns Hopkins University applied Physics Laboratory/Carnegie organisation of Washington

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21 Gros destiné pris par la recherche MESSENGER:Cratère Matisse 208 kilomètre dia. As NASA’s MESSENGER spacecraft approached mercure on January 14, 2008, auto spacecraft took this image of auto crater Matisse.

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Named parce que le the french artist Henri Matisse, Matisse crater to be imaged during auto Mariner 10 mission and is around 130 miles in diameter. Matisse crater is in the southern hemisphere and can be viewed near the terminator ns the planet (the heat between auto sunlit, day side et the dark, night side). Nous Mercury, craters room named for people, currently deceased, who ont made contributions to the humanities, such ont artists, musicians, painters, et authors. The internationale Astronomical syndicat (IAU) oversees the official process de naming new craters and other new features discovered on bodies throughout auto solar system. Researchers studying et mapping unnamed functions can suggest names à la consideration par the IAU. Auto 1,213 images taken by MESSENGER throughout its sapin flyby conference with mercury cover a super region of Mercury"s surface previously unseen passant par spacecraft, revealing many nouveau craters et other features that will need to be named. Credit: NASA/Johns Hopkins University used Physics Laboratory/Carnegie agence of Washington
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22 Première photo à haute résolution détient par la exploration MESSENGEROne la semaine ago, the MESSENGER spacecrafttransfer to sol the first high-resolution photo of Mercury de a spacecraft in over 30 years, since thé three mercure flybys ns Mariner 10 in 1974 et MESSENGER"s Wide angevine Camera (WAC), part du the mercure Dual Imaging system (MDIS), is equipped through 11 narrow-band color filters, in comparison to the two visible-light filters and one ultraviolet filter that were nous Mariner 10"s vidicon camera. De combining images taken through various filters in the visible et infrared, the MESSENGER les données allow mercury to be seen in a variety ns high-resolution shade views not formerly possible. MESSENGER’s eyes have the right to see frais beyond thé color range ns the human being eye, et the couleurs seen in thé accompanying photo are somewhat various from what a human being would see. Thé color d’image was generated de combining three separate images taken v WAC filters sensitive to light in various wavelengths; filters that transmit light through wavelengths of 1000, 700, et 430 nanometers (infrared, frais red, et violet, respectively) were placed in auto red, green, and blue channels, respectively, venir create this image. The human eye is sensitive across seul the wavelength variety 400 venir 700 nanometers. Producing a false-color la peinture in this means accentuates shade differences on Mercury"s région that can not be watched in thé single-filter, black-and-white images released critical week. Credit: NASA/Johns Hopkins University applied Physics Laboratory/Carnegie organisation of Washington

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23 Effondrement potentiellement signal d’activité volcaniqueMESSENGER"s Narrow angevine Camera (NAC) on the mercury Dual Imaging système (MDIS) acquired this view of Mercury’s surface illuminated obliquely from auto right par the Sun. Auto unnamed crater (52 kilometers, or 31 miles, in diameter) in the center of the la peinture displays a telephone-shaped fallen feature conditions météorologiques its floor. Such a please feature, not seen conditions météorologiques the floors ns other craters in this image, could reflect past volcanic activity at and just below the surface du this particular crater. MESSENGER team members are analyzing closely the more than 1200 images returned indigenous this flyby for other surface features the can administer clues to thé geological history du the innermost planet. Thé crater is situated in the southern hemisphere ns Mercury, on the à côté de that was not viewed de Mariner 10 during any de its three flybys ( ). This scene to be imaged when MESSENGER to be departing from mercure from a éliminer of around 19,300 kilometers (12,000 miles), about 1 hour after the spacecraft"s the next encounter with Mercury. The image is ns a an ar approximately 236 kilometers (147 miles) across, and craters as small as 1.6 kilometers (1 mile) have the right to be seen. Credit: NASA/Johns Hopkins University used Physics Laboratory/Carnegie agence of Washington

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24 Évolution géologique complexeA complex history of geological évolution is tape-recorded in this structure from auto Narrow angevin Camera (NAC), part du the mercure Dual Imaging system (MDIS) instrument, taken throughout MESSENGER’s close flyby of mercure on January 14, aller of an old, gros crater rectal most of the reduced left les pièces of the frame. An arrangement du ridges and cliffs in the shape ns a "Y" crosses thé crater’s floor. Auto shadows defining auto ridges space cast nous the floor du the crater passant par the sunlight shining from thé right, indicating a to decrease stair-step de plains. Auto main, right-hand branch ns the "Y" crosses thé crater floor, the crater rim, and continues off the top edge of the picture; ce appears à be a classic “lobate scarp” (irregularly shame cliff) typical in all areas of mercury imaged sauce soja far. This lobate scarps were formed throughout a duration when Mercury’s crust was contracting ont the planet cooled. In contrast, thé branch of the Y to the left end at thé crater rim and is limited to auto floor de the crater. Both it and the lighter-colored ridge the extends downward from ce resemble “wrinkle ridges” that space common conditions météorologiques the super volcanic plains, jaune "maria," conditions météorologiques the Moon. Auto MESSENGER science team is studying what features like these reveal about auto interior cooling history ns Mercury. Ghostly remnants of a few craters room seen conditions météorologiques the ideal side de this image, possibly indicating the once-pristine, bowl-shaped craters (like those nous the super crater’s floor) ont been consequently flooded de volcanism or some différent plains-forming process. This photo was bring away 18 minutes after close approach, as soon as MESSENGER was around 5,000 kilometers (about 3,000 miles) away from Mercury. The la peinture is about 200 kilometers (about 125 miles) across, and features oui small ont about 400 meters (about 400 yards) deserve to be resolved. Mission Elapsed temps (MET) du image: Credit: Credit: NASA/Johns Hopkins University used Physics Laboratory/Carnegie agence of Washington

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25 just nine protocole after MESSENGER passed 200 kilometers (124 miles) over the région of mercure – that closest supprimer to thé planet during auto January 14, 2008, flyby – auto probe’s Wide angle Camera (WAC) conditions météorologiques the mercury Dual Imaging system (MDIS) snap this image. Thé WAC is equipped with 11 different narrow-band filters, and this la peinture was bring away in filter 7, i beg your pardon is sensitive venir light close to the rouge end de the montrer clairement spectrum (750 nm). This view, additionally imaged through thé remaining 10 WAC filters, is from the first set of images taken adhering to MESSENGER"s closest method with Mercury. The photo shows Mercury"s surface ont seen indigenous a low viewing angle, spring over auto surface et off thé limb ns the planet nous the best side de the image. Auto cratered mouvement in the photo is on the side of mercury unseen passant par spacecraft prior venir this MESSENGER flyby. This scene was imaged at many viewing angles as MESSENGER sped far from Mercury, and these multiple views ns the same région features from different perspectives et in different colors will it is in used venir help understand the properties ns Mercury"s surface.

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26 Impact majeur récent, avec impacts secondairesOn January 14, 2008, NASA’s MESSENGER spacecraft observed around half du the hemisphere not seen passant par Mariner 10. This d’image shows part ns a large, new crater with secondary crater chains located near Mercury’s equator nous the side du the planet newly imaged de MESSENGER. Large, flat-floored craters show terraced rims indigenous post-impact collapse du their newly created walls. Auto hundreds of secondary impactors that are excavated from the planet’s surface by an incoming object, create long, direct crater chains radial to the henchmen crater. This chains, in enhancement to thé rest of the ejecta blanket, create the complicated, hilly action surrounding thé primary crater in thé image. De counting craters that have formed due to the fact that the un tube event, the age of the crater have the right to be estimated. This count deserve to then be compared with a comparable count parce que le the crater floor to determine whether any kind of material has actually partially filled thé crater because its formation. Through their super size et production ns abundant second craters, this flat-floored craters both illuminate et confound auto study de the geology history of Mercury. Credit: NASA/Johns Hopkins University applied Physics Laboratory/Carnegie organisation of Washington

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27 Cratères und plaines oui NASA’s MESSENGER spacecraft attracted closer venir Mercury for its historic first flyby, the spacecraft acquired this d’image showing a variety ns surface textures, consisting of smooth plains at the centre of thé image, numerous impact craters and rough material that shows up to ont been ejected native the taille crater to thé lower right. MESSENGER has obtained over 1200 images of Mercury.

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These espèce of images will aid scientists venir study, ont never before, details to help them find out about auto history et evolution du the innermost planet. Credit: NASA/Johns Hopkins University used Physics Laboratory/Carnegie agence of Washington
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