پاورپوینت کامل Surface Exploration of Mars: Past and Future 35 اسلاید در PowerPoint

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پاورپوینت کامل Surface Exploration of Mars: Past and Future 35 اسلاید در PowerPoint

اسلاید ۴: ۸ Sept 2003Solar System – C. C. Lang4Globules of carbonate minerals (the yellow-orange grains) are scattered along cracks in this small chip of ALH 84001. The rims contain iron oxides (including magnetite) and iron sulfides–incompatible minerals that on Earth would suggest microbial action Controversial – microbial presence in meteoritesClose up views reveal structure similar to Earth microbesAstrobiology: exciting field of research – study of origin of life in the solar system,universe- LIFE IS UBIQUITOUS in the universe – we just haven’t found it- LIFE IS A SPECIAL quirk of nature and timing – very very rare!

اسلاید ۵: ۸ Sept 2003Solar System – C. C. Lang5Phobos (20 km x 27 km)Comparison: Asteroid Eros (33 km x 13 km)Martian MoonsDeimos Two moons: Deimos, PhobosSmall (~20km) irregularly shaped Orbit Mars in 8hr, 30hr Probably captured asteroids

اسلاید ۶: ۸ Sept 2003Solar System – C. C. Lang6Risks of Solar System MissionsPROS for Space MissionsClosest views of the planetsthat are possibleAccess to wavelengths that are unavailable on the groundAtmospheric effects gone – get clearer views than on EarthDevelopment of sophisticated tech. and researchCONS for Space MissionsCan not fix/test equipment as easilyLarge risk with rocket launchMuch much more costly! (although more costly for manned than unmanned)Lifetime is usually shorterUpgrades much more difficultRisks from UV radiation, cosmic rays

اسلاید ۷: ۸ Sept 2003Solar System – C. C. Lang7Viking Landers 1 and 2 Viking 1 launched in August of 1975, Viking 2 launched in Sept. 1975 Vikings arrived at Mars in June, August of 1976 Orbiter + Lander – Orbiters alone weighed close to a ½ ton each – very expensive launch/rocket equipment !!- these days NASA’s mantra: “Faster Better Cheaper”

اسلاید ۸: ۸ Sept 2003Solar System – C. C. Lang8Viking Lander Images of Mars’ Surface landing site chosen from Orbiter images – two different regions in Northern Lowlands revealed that the surface of Mars was littered with jagged rocks and fine dust everywhere rocks were probably result of crater-forming impact (“ejecta”) rocks resemble lava-rocks on Earth – lava flows broken up by impacts

اسلاید ۹: ۸ Sept 2003Solar System – C. C. Lang9Viking Landers: Search for Life on Mars Science Instruments: chem lab to explore reactions of Mars rock with water (none detected) scoop arm with magnet – found that the soil was IRON-rich