the solar system solar nebular theory inner planets outer planets x
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The Solar SystemSolar Nebular TheoryInner PlanetsOuter PlanetsX
Solar Nebular TheoryLeading theory on the origin of our solar system not to be confused with the Big Bang Theory (origin of the universe)Solar system began with the development of the Sun the only star in our solar systemOutcome is a disk shaped system of the Sun surrounded by 8 planets, their moons, meteors, asteroids and cometsAll planets and their moons are situated in the disk on basically the same plane
Solar System Birth What it Might Look LikeGas and dust in a nebula collapsing due to gravity and creating a starSwirling debris left over after the collapsewill become planets as time passes
Solar Nebular TheoryClick below for video clip
Solar Nebular TheorySolar System Birth - Large cloud of dust and gas collapse to form dense core begins to spin and flatten into a diskProto-Sun Forms - Nebulas densest part attracts more gas and dust getting larger and hotterSmall Bodies Form - Particles stick together into fragments called planetesimals (building blocks of planets)
Solar Nebular TheoryProto-Planets Form - Planetesimals clump together to form larger bodies called proto-planetsPlanets Emerge - Sun becomes a star and its radiation blows away most leftover dusty gas, leaving behind 8 planets & moons
The Sun and eight* PlanetsMy Very Excellent Mother Just Served Us NachosMercuryVenusEarthMarsJupiterSaturnUranusNeptune
The Inner PlanetsClick below for video clip
The Inner PlanetsTerrestrial Planets made of rock with cores of ironMuch smaller than the gas giantsDensePlanets surfaces have evidence of meteor impacts craters
MercuryMoves faster around the sun than any other planet. (Named by the Romans after the fleet-footed messenger of the gods because of its speed)The closest planet to the Sun The surface of Mercury is badly scarred with craters due to the constant bombardment of meteorites. No atmosphere so really cold at nightIce can be found in shadows of deep cratersRank in size 8th
VenusOften called Earths sister planet close to the same size and has similar composition as the EarthVenus has a thick atmosphere of carbon dioxide causes greenhouse effect which traps immense heat and creates immense pressureHas the highest average surface temperature, as much as 475 C (900 F) due to greenhouse effectAtmosphere is so thick that we do not know what the surface is like without radar technologySize Rank 6th
EarthThe only planet to have water in all three phases ice, liquid, water vaporNitrogen gas dominates the atmosphereSilicon and oxygen dominate the crustSize Rank 5th (largest inner planet)Will learn lots more later!!!
MarsRed Planet due to iron oxide (rust) in the crustHas the largest volcano in the solar system Olympus Mons (4 times larger than Earths tallest mountain - Mt. Everest)Has polar ice caps and ice frozen under the surfaceDeep canyons are evidence that water once flowed on MarsSize Rank 7th
How Large are Martian Volcanoes?As large as some states
Probes to Marshttp://www.space.com/12568-opportunity-nears-endeavor-crater-7-years-roving.html
The Boundary Line* Asteroid Belt *Rocky bodies that orbit the Sun between Mars & JupiterNatural Boundary between the inner planets and the outer planets
The Outer PlanetsJovian PlanetsClick below for video clipFor Size Comparison
The Outer PlanetsJovian PlanetsKnown as the Gas Giants or Jovian PlanetsVery large planetsMade of mostly gas and dustPluto was the exception more similar to inner planets small and solid.
JupiterThe largest planetPredominantly gas 90% hydrogen, 10% heliumHas the Great Red Spot a giant stormHas the largest moon in the solar system Ganymede (larger than Pluto and Mercury)Has a moon that is volcanically active IoSize Rank 1st
SaturnAnother gas planet - Density is so low it could float on waterHas the widest array of rings made of gas, dust and iceHas 2nd largest moon Titan (has nitrogen atmosphere like Earth)Size Rank 2nd
UranusRevolves around the sun like a spinning wagon wheel axis is tilted on its sideHas a blue/green color due to methane in the atmosphereSize Rank 3rd
NeptuneAnother gas planetMethane in the atmosphere gives it the blue-green colorSize Rank 4th
Now called a dwarf planet by astronomers Has an eccentric orbit sometimes coming closer to the Sun than NeptuneMade mostly of rock and ice (unlike the other outer planets)
As compared to the U.S.How Small is Pluto?Plutos moon - Charon
Asteroids, Comets, MeteorsClick below for video clip
AsteroidsAsteroids - small to large solid objects orbiting the sun usually between Mars and Jupiterpossibly left over debris that never joined up with other planets in the beginning.Some get bumped out of orbit and can slam into planets.
CometsComets balls of ice, dust and gas with a streaming tail pointing away from the sun (solar wind blows it)many comets reside in the Kuiper Belt or further out in the Oort Cloud.
Click for animation
Meteor ShowerMeteors aka shooting stars - debris that burns up in Earths atmosphereMeteoroids debris moving through spaceMeteorites debris that hits Earths surface creating cratersDebris is generally leftover from comets tails