Astronomy Exam 2 Study Guide - Astronomy Exam 2 Study Guide...

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Astronomy Exam 2 Study Guide Mercury: Iron planet in the steel city Core made of iron, largest iron core in comparison to its size Calorias Basen – feature caused by impact on something large Extremely hot world – scientists believe they found ice craters on mercury. Smallest planet in our solar system Venus: Dense carbon dioxide atmosphere, green house effect 900 degrees F. day and night, hot enough to melt lead Atmospheric pressure 100 times greater than earths Clouds of Venus are made of sulfuric acid Retrograde rotation, rises in the west, sets in the east (opposite of Earth) Istar Tiara – prominent feature of Venus Mars: Does not have a thick atmosphere Most abundant element in the atmosphere is carbon dioxide Largest known volcano in solar system – Olympus Mons Very large canyon – mariner valley Space craft that have been to mars: 1. Path Finder 2. Spirit 3. Opportunity 4. Viking (1977) 5. Phoenix (landing in May 2008)
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