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TPA D Xanadu Belet Xanadu Adiri TITAN Ligeia Mare Kraken Mare L eil ah FlucTus M enrva E liv aga r Fl umina Ksa Sinlap Xanadu FENSAL B e l e t Adiri Xanadu 1° 1° 0° 0° L-1° L-1° 1° 0° 181° 359° 179° 180° Senkyo Guabonito AZTLAN Huygens Ontario Lacus Arrakis Planitia M E Z Z OR A M I A FLÄCH ER EN B - O 779 57 -180°C SONNE 3 - T MERKUR TE UR JUPITER ERDE MPERAT GravitatioN ÄREN 150 DICHTE 5.51 g/cm 2 TitaN PH DR ERDE DICHTE 1.88 g/cm OS U 9.81 m/s C M K GravitatioN T A 108 1.35 m/s2 P 1467 mb 3 URANUS RFLÄCH S BE E O VENUS . Titan ist der größte Mond des Ringplaneten Saturn. Außerdem ist der einzige O N N E 2 N Mond überhaupt, der eine dicke Atmosphäre hat. Die Gesteine an der Oberfläche E LÄNGE DES ÄQUators 40 075 km 83 305 418 km 228 N Titans – seine Felsen also – bestehen aus Wassereis. Das Innere von Titan A TF ER Materialprobe N ist zur Zeit nicht heiß, deshalb findet man auf ihm keine Vulkane. Dennoch ist U NG : LÄNGE DES ÄQUators seine Oberfläche in ständigem Wandel, der hauptsächlich durch den Kreislauf 14 16 177 km 26 ZUSAM TZUNG eines Stoffes namens Methan verursacht wird. Flüssiges Wasser gibt es auf M 2 SOLARKONstaNTE MENSE HMES MARS ILL SatURN RC SE IO SOLARKONstaNTE DER ATMOSPHÄRE Titan nicht, weil das Material der Eisfelsen bei der -180°C Kälte ewig “steinhart” U R 5148 km NE 15 W/m D N 1361 W/m bleibt. Auf Titan kann das Methan gasförmig, fest oder flüssig genauso KM ZUSAMMENSETZUNG 2 95% N vorkommen, wie etwa das Wasser auf der Erde: Bei uns ist es das Wasser, das DER ATMOSPHÄRE 23:56 15.9d 2 d 5% CH im gasförmigen, flüssigen oder aber auch festen Aggregatzustand vorkommen NEPTUN 7 4 TitaN E 8% N2, 21% O2 G kann. Auf der Erde kommt Methan nur als Gas vor, zum Beispiel in der Flamme A 1% Ar CO2 T , 0,04% EISGERÖLLEN eines Gasherdes. In der kalten Atmosphäre des Titans es fällt Methanregen aus U 15 ML N: den Wolken. Er sammelt sich zu Flüssen, die dann in die Seen und Meere des AUFZ ATUR EIT UM S Polargebietes fließen. Am Äquator reihen sich parallele Streifen dunkler Dünen aneinander. Ihr Sand bedeckt die Oberfläche. Im Sonnensystem sind es die Landschaften des Titan, die jene auf der Erde am stärksten ähneln. Dennoch ist es ein Himmelskörper, der ganz anders funktioniert als die Erde. Die Raumsonde Lambertsche flächentreue Azimutalprojektion1 : 16 000 000 (1 cm = 160 km) Redaktion: Henrik Hargitai. Grafik: Panka Pásztohy. Fachlicher Lektor: Jim ERDE TitaN Zimbelman. Deutsche Übersetzung: Tamás Mikes. Gefördert durch das International Cartographic Association Commission on Planetary Cartography, Europlanet Huygens landete an seiner Oberfläche in 2005. Diese ist die von der Sonne am 2012 Outreach Funding Scheme, Paris Observatory. Herausgegeben von der Eötvös Universität, Budapest. ISBN 978-963-284-438-1, [PDF] ISBN 978-963-284-437-4. weitesten entfernte Welt, wo es jemals Oberflächenfotos gemacht wurden. Illustration © Panka Pásztohy 2014. Text © Henrik Hargitai 2014. German translation © Tamás Mikes 2014. http://kartenfuerkinder.wordpress.com.
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