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Milky Way Galaxy
Typical Spiral Galaxy
Keyhole Nebula
Another Nebula in the Milky Way
Etacar Nebula
Crab Nebula
Horse Head Nebula
Sun
Greek-Helios
Latin-Sol
Sun Spots
The Planets
Relative Sizes of the Planets
Venus
Earth
MarsMercury
Saturn
Jupiter
Uranus
Neptune
Pluto
Terrestrial
Planets
Jovian Planets
The Terrestrial
(like Earth)
Planets
Mercury, Venus, Earth, and Mars
Near the Sun (inner planets)
Small, rocky / metallic
Thin atmospheres or no atmosphere
Few, if any, moons
Extensive cratering
like the moon
Mercury
Nearest the sun…fastest moving
Orbital Period = 88 Earth days
No atmosphere or moons
Day Time Side
600°F
Night Time Side
-300°F
Closer view of craters on Mercury
Venus
Retrograde rotation,
Sun rises in the west
Rotation Period = 243 Earth days
Orbital Period = 225 Earth days
Thick cloud cover
No moons
obscures the surface
“Day” is longer than a “Year”!
High CO2 levels create extreme
Greenhouse Effect
Surface temperature > 900°F
Radar Topographical Map
of the surface of Venus
Closer view of Venusian surface features
Mountains
many are volcanic
Low areas, like ocean
basins on the Earth
Coastal plains
Earth
Continents
Ocean
basins
Earth and Moon
seen together
Mars
Deimos
"panic"
Phobos
"fear"
Valles Marineris
Grand Canyon:
270 miles long, 1 mile deep
Valles Marineris
2500 miles
4.5 miles deep
Olympus Mons
"Mount Olympus"
Extinct Volcano
Highest mountain in the Solar System
Olympus Mons
17 miles high
Mt. Everest is 5 miles high
350 miles wide
Close up view of Martian surface
Evidence of ancient water
on the Martian surface
River System with Delta
Features on the Martian surface
that have caused “wild”
conjecture concerning the
habitation of Mars
Face?
Smiley Face?
Heart?