a yellow star made of hydrogen and helium gas. the sun gives off energy!
TRANSCRIPT
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A yellow star made of HYDROGEN AND HELIUM GAS.
The sun gives off ENERGY!
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SOLID fastest planet Smallest 88 day Rev.Craters are the main featureNo AtmosphereExtreme Temps. Hot and Cold (Facing sun: 430 C (800 F)/ Not facing sun – 170(– 280 F)
Geologically Dead – Cooled core (Densest planet – thick core of iron) No Volcanoes/Plate Tect.The surface of Mercury does not change b/c there NO ATMOS/NO Weather & it is Geo. DeadMost like E.’s MoonExploration: Mariner 10 flyby for images 1974-74
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Rev. time = 243 daysRotation time = 288 daysA DAY IS LONGER THAN A YEAR ON VENUS!
Rotates slowly & BACKWARDS
SOLID; “Earth’s Twin” in mass & size
460 C (900 F):HOTTEST THICK atmosphere of heat-trapping (green-house) gases: CO2, CH4, H2O
High Atmospheric pressure – crush you like a can!
Craters, Volcanoes, Mts., Canyons, Storms, Acid Rain (So2), No more plate tectonics?Explored: Soviet Spacecrafts descended & were destroyed
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SOLID
Atmosphere : 78% Nitrogen, 21% Oxygen, 1% other gases (CO2, H2O, + more)
Temps. 57 F (average.) – Warm enough for liquid water!
(1) Moon
Features: Craters, Volcanoes, Mts., Canyons, Plates, Liquid water, LIFE
Geologically Active: Hot interior, active volcanoes, plate tectonics,
Weathering & Erosion change surface.
1 AU from sunRev.= 365.25 days Rotation ~ 24 hrs
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1.5 AUs from sun
Rev. = 1.8 years
Rotation time = 24 hrs
SOLID
Almost ½ Earth’s size
Atmosphere: Thin CO2
Temps. Very Cold Range: – 207 (poles) to 70 F (equator in summer)Has Seasons
Features: Craters, extinct volcanoes, canyons, ice caps (water & CO2), dry river beds, dust storms
Geologically Active? – Cool interior, No tectonics, No volcanism
Yes – Wind Erosion
The Red Planet
Satellites/Moons: Phobos & Diemos (small, not round)
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http://www.cosmosmagazine.com/files/imagecache/news/files/news/20080722_mars_surface.jpg
http://zuserver2.star.ucl.ac.uk/~idh/apod/ap970915.html
http://www.mactonnies.com/firstcolor.jpg
http://www.rps.psu.edu/0305/graphics/price_01.jpg
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http://www.marsbase.net/m/mars-map.php
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Most Explored Planet
Orbiting Spacecrafts – Images & Climate & Temp. Readings
Rovers – Spirit & Odyssey are still roving!
http://marsrovers.nasa.gov/home/index.html
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Change on Mars
1. Describe conditions on early Mars? In what ways was it Earth-like?
2. What happened? Map the changes that took place to make Mars a cold frozen planet.
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Inner Planets (Terrestrial)
Commonalities:
1.Relative small size
2.Solid, rocky surfaces (Craters)
3.Few or no moons
4.Warmer than outer planets
5.No rings
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Asteroids = Big Space Rocks (< 1 km in diameter)
•Separates the inner and outer solar system
•Early S.System remnants that didn’t form planets.
•Not enough mass (hence gravity) to be spherical.
•Some are rubble heaps
•Rock + Metals (platinum, cobolt) + ice
NASA’s NEOhttp://neo.jpl.nasa.gov
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VideosThe Universe Season 1, Episode 7
Mercury & Venus (1/3)
http://www.youtube.com/watch?v=jDWCRPa6e0I&playnext=1&list=PL16515A70C153B1E3
Mercury & Venus (2/3)
http://www.youtube.com/watch?v=s8GzadApTpM&playnext=1&list=PL16515A70C153B1E3
Mercury & Venus (3/3)
http://www.youtube.com/watch?v=6Q6LHuaT3bo&playnext=1&list=PL16515A70C153B1E3
Mars (1/3)
http://www.youtube.com/watch?v=Ymg4n80tnv4&playnext=1&list=PL98664440C5493F39
Mars (2/3)
http://www.youtube.com/watch?v=SwmKYRYCq-w&playnext=1&list=PL98664440C5493F39
Mars (3/3)
Carl Sagan’s Cosmos
http://www.youtube.com/watch?v=iBqjob-UVeo