Eccentric orbit - PowerPoint PPT Presentation

Ice Ages

Ice Ages. Pleistocene 3 M.y. Permian 250-220 M.y. Ordovician 450 M.y. Precambrian 900-650 M.y. (Snowball Earth) 2300 M.y. Take-Away Points. The recent period of ice advances since 2.5 million years ago is called the Pleistocene

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Life on Earth &amp; Space Exploration

Life on Earth &amp; Space Exploration. 7.9AB. Comet . A celestial body moving about the Sun, usually high eccentric orbit, consisting of a central mass surrounded by an envelope of dust and gas that may form a tail as it streams away from the Sun. Meteoroid.

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Eccentric orbit - PowerPoint PPT Presentation

Ice Ages

Life on Earth &amp;amp; Space Exploration

Life on Earth & Space Exploration