lo 11-ss-innerplanets
TRANSCRIPT
MercuryMercury
MercuryMercuryassembled by images from Mariner 4 (1974)assembled by images from Mariner 4 (1974)
VenusVenus
Venus’ Runaway Greenhouse Venus’ Runaway Greenhouse EffectEffect
Atmosphere:Atmosphere:
Thick -90 barsThick -90 bars
CO2CO2
Some N, othersSome N, others
Temp: 730KTemp: 730K
= 850 F= 850 F
Venus ExplorationVenus Exploration
Fly-bys since 1962Fly-bys since 1962
Probes since 1970Probes since 1970
Orbiters since 70’s – Orbiters since 70’s – use radar studiesuse radar studies
Magellan – Venus Magellan – Venus orbiter - 1989orbiter - 1989
The Atmosphere of VenusThe Atmosphere of Venus
Venus – albedo = 80%Venus – albedo = 80%
Clouds – Sulfuric AcidClouds – Sulfuric Acid
Geology of VenusGeology of Venus
500 MA – Intense 500 MA – Intense VolcanismVolcanism
Rolling plains with 2 Rolling plains with 2 highland areashighland areas
Visible volcanic Visible volcanic depositsdeposits
Torn crust, ridges and Torn crust, ridges and cracks cracks Tectonic Tectonic ForcesForces
MarsMars
The Red PlanetThe Red Planet
StatisticsStatistics
1.5 AU from Sun1.5 AU from Sun
Orbit: 687 earth-daysOrbit: 687 earth-days
Rotation: 24.5 hoursRotation: 24.5 hours
Color: Reddish (iron in soil)Color: Reddish (iron in soil)
Density: lowDensity: low
Diameter = half of Earth’sDiameter = half of Earth’s
Magnetic Field – noneMagnetic Field – none
Cratered Surface of MarsCratered Surface of Mars
Cratering Period from 3 – 4 GACratering Period from 3 – 4 GA
Water on MarsWater on Mars
Mars’ VolcanoesMars’ Volcanoes
Olympus MonsOlympus Mons
Tharsis AreaTharsis Area
Valles MarinerisValles Marineris
5000 km long5000 km long
Formed by pressure from belowFormed by pressure from below
Shaped by water and windShaped by water and wind
Mars’ SurfaceMars’ Surface
Iron in soilIron in soil
Why not in core?Why not in core?
Atmosphere of MarsAtmosphere of Mars
Storms on MarsStorms on Mars
Dust Storm and Cyclonic StormDust Storm and Cyclonic Storm
Satellites of MarsSatellites of Mars
Phobos and DeimosPhobos and Deimos
Life on Mars?Life on Mars?
Exploration of MarsExploration of Mars
Fly-bys since 1965Fly-bys since 1965
Orbiter in 1971Orbiter in 1971
Viking 1 and Viking 2 Viking 1 and Viking 2 – Landed in 1976– Landed in 1976
Rovers Spirit and Rovers Spirit and Opportunity – still Opportunity – still goinggoing