Transcript inhospitable

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My Very Educated Mother Just Served Us Nine
Pies
° Our solar system is comprised of the sun,
9 planets, asteroids, meteoroids, and comets
° Our sun is one of 200 billion stars that make up
the Milky Way galaxy
° The Milky Way galaxy is one of 200 billion
galaxies that make up the universe
° The planets are divided into 2 groups:
inner and outer
The inner planets are small
and terrestrial (earth-like, rocky)
Mercury
heavily cratered, resembling our moon
trace atmosphere
59 days to rotate
88 days to revolve
(2 revolutions = 3 rotations)
largest temperature range
700 °F to -300 °F
° no moons
° about the size of earth’s moon
° may be the remnant core of a planet
Venus
° our nearest neighbor
° almost the same size as earth (sister
planet)
inhospitable
° 97 % of the atmosphere is CO2
runaway Greenhouse Effect
900+ °F (hottest planet)
° air pressure 90 times that of earth
° sulfuric acid in the atmosphere give it a
yellow tint
retrograde (clockwise) rotation
no moons
3 brightest object in our sky
Mars
polar ice caps of CO2 and water which get
larger and smaller with the seasons
the surface has an orange color due to iron
oxidizing (rust)
several bits of evidence which suggest
water: channels, river beds, ice caps
Olympus Mons, the largest volcano in the
solar system (300 miles in diameter and 17
miles high)
almost the same size as Arizona
2 moons: Phobos and Deimos
Asteroid belt
rocky objects orbiting the sun between the
inner and outer planets
they generally look like a potato
The Outer Planets
The Outer Planets: huge, Jovian (Jupiterlike), gaseous, moons, and rings
And pluto
Jupiter
largest planet
Great Red spot (2-3 times the size of earth)
Europa (moon) may have ocean under its ice
crust
Io (moon) has atmosphere
and active volcanoes
Saturn
less dense than water
1,000+ rings
Uranus
retrograde rotation (backwards)
axis of rotation is nearly 90°
may be due to a collision with
Miranda (moon)
Neptune
Great Dark Spot comes and goes
Pluto & Charon
not Jovian
is now considered a dwarf planet
consists of ice and rock
Charon may be its double planet (half the
size of Pluto)
sunlight takes 6 hours to reach it
most eccentric orbit (closer than Neptune
from 1979-1999)
travels in a tilted orbital plane