sl9pre hst.jpg Tidal Heating of Moonsastronomy.nmsu.edu/agso/tidal_force_presentation_notes.pdf ·...
Transcript of sl9pre hst.jpg Tidal Heating of Moonsastronomy.nmsu.edu/agso/tidal_force_presentation_notes.pdf ·...
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Tidal Heating of Moons
http://astronomy.nmsu.edu
http://nssdc.gsfc.nasa.gov/image/planetary/comet/sl9pre_hst.jpg
http://photojournal.jpl.nasa.gov/catalog/PIA11688http://www.nasa.gov/multimedia/imagegallery
/image_feature_758.html
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Tides on Earth
http://www.universetoday.com/20489/moon-compared-to-earth/
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Tides on Earth
http://www.universetoday.com/20489/moon-compared-to-earth/
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Tides on Earth
http://www.universetoday.com/20489/moon-compared-to-earth/
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Tides on Earth
http://www.ps.missouri.edu/rickspage/Moon/Tides.html
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Moons in the Solar SystemEarth’s Mars’ Jupiter’s Saturn’s Uranus’ Neptune’s Pluto’s
http://en.wikipedia.org/wiki/File:Moons_of_solar_system_v7.jpg
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Moons in the Solar SystemEarth’s Mars’ Jupiter’s Saturn’s Uranus’ Neptune’s Pluto’s
http://en.wikipedia.org/wiki/File:Moons_of_solar_system_v7.jpg
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Jupiter’s Moon Io
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http://en.wikipedia.org/wiki/File:Iosurface_gal.jpg
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Jupiter’s Moon Io
http://apod.nasa.gov/apod/ap000606.html
http://www.nasa.gov/multimedia/imagegallery
/image_feature_758.html
http://science.nasa.gov/science-news/
science-at-nasa/2007/09mar_alienvolcano/
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Jupiter’s Moon Europa
http://www.nasa.gov/multimedia/imagegallery/image_feature_1339.html
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Europa’s Cracked Icy Surface
Europa Earth (Greenland)
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Saturn’s Moon Enceladus
http://www.newscientist.com/gallery/2009june22-week-in-space
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http://apod.nasa.gov/apod/ap071013.html
Enceladus’ Briny Geysers
http://apod.nasa.gov/apod/ap080331.html
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Neptune’s Moon Triton
http://commons.wikimedia.org/wiki/File:Triton_(moon).jpg
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Tidal Heating Activity
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Tidal Heating Activity• Stretching elastic bands!
• Changing stretching = friction = heat
• Gravity stretches Moons = tidal force
• Changing tidal forces also cause heat
• Certain arrangements result in lots of
stretching
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The Rings of Saturn
http://apod.nasa.gov/apod/ap061016.html
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The Rings of Saturn
http://saturn.jpl.nasa.gov/photos/imagedetails/index.cfm?imageId=2794
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The Rings of Saturn
Enceladus &
the E ring!
http://photojournal.jpl.nasa.gov/catalog/PIA03550
http://apod.nasa.gov/apod/ap070327.html
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Summary• Some moons are far from the Sun but are
heated somehow
• Gravity stretches moons = tidal force
• Changing tidal forces provides heat by friction
• Heated moons can have volcanoes, geysers,and oceans!
– Tidal heating means water can be a liquid even inplaces far from the Sun.Where there’s water, there might be life!Follow the water!