A Tour Of The Solar System. Galaxies. Galaxies are huge regions of space that contain the stars, planets, and other astronomical features They can have many shapes Spiral Elliptical Irregular Our galaxy is known as the milky way galaxy
The earth is distinguishable from the other terrestrial planets because of its surface water
Water accounts for 71% of the earth’s surface
The earth’s atmosphere is 77% nitrogen and 21% oxygen
The atmosphere helps block out harmful rays and maintains the surface temperatureEarth’s Oceans and Atmosphere
No surface water exist on the surface of mercury planets because of its surface water
Potentially ice located in craters that see little sun (polar regions)
Possesses a thin atmosphere
Atmosphere is surface material lifted by solar wind interactionWater / Atmosphere
Mars has an axial tilt of 25 planets because of its surface water.
Orbital period is nearly twice that of the earth’s so seasons are nearly twice as long.
Tilt and highly elliptical orbit results in temperature variations from 140 K to 300 K.
The atmosphere of mars is very thin
Composed primarily of CO2
Seasonal dust storms results in a lot of dust in the atmosphere
Small % of water in atmosphere can produce cloudsMar’s Rotation / Atmosphere
Features include: planets because of its surface water
Olympus Mons (24 km high and 550 km wide)
Shield volcanoes that do not rise very high but extend for great distances.
Valles Marineris (3000 km long, 8 km deep, and 600 km wide)
Southern hemisphere heavily cratered while northern hemisphere is not
8 known moons planets because of its surface water
Largest of which is Trition (1350 km)
Asteroids: planets because of its surface water
C-type: (75%) same composition as sun minus hydrogen and helium
S-type: (17%) nickel-iron mixed with iron and magnesium silicates
M-type: (8%) pure nickel-iron
Mixture of non-volatile grains and frozen gasesCompositions