Our Solar System ©Mark Place, 2007-2008 www.LearnEarthScience.com.

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Presentation transcript:

Our Solar System ©Mark Place, 2007-2008 www.LearnEarthScience.com

The total mass of all the asteroids is less than that of the Moon. rocky objects with round or irregular shapes lie in a belt between Mars and Jupiter The total mass of all the asteroids is less than that of the Moon.

only visible when they are close to the sun

Comet orbit (notice tail) Famous comets

shooting stars Meteor showers (link)

Meteorites Meteoroids (in space) that STRIKE the ground = MeteoriTes!! 3 main types: 1 – Stony - Si, Al = “crust” 2 – Metallic - Fe, Ni = “core” 3 – Carbonaceous chondrites – C = “life” http://curious.astro.cornell.edu/question.php?number=470

Apophis Nasa

The Planets

Terrestrial vs. Jovian Terrestrial planets are the inner, earth-like planets Jovian planets are the outer, Jupiter-like planets

Draw a line across the table between the terrestrial and Jovian planets and label.

Which are more dense? Jovian or terrestrial

Which have more moons ? Jovian or terrestrial

Which have longer periods of revolution? Jovian or terrestrial

Which are larger in size on average ? Jovian or terrestrial

Which planet has the longest day? Venus

Which planet has the longest year? Neptune

Pg. 7

How are the orbits of the planets described? slightly, eccentric ellipse - Kepler's 1st Law eccentricity website

More eccentric Which planet has the least Mercury perfectly circular orbit? More eccentric Mercury

Least eccentric Venus Which planet has the most perfectly circular orbit? Least eccentric Venus

Calculate the eccentricity of the ellipse below: length of major axis Formula: eccentricity = distance between foci (d) length of major axis (L)

d = 1.7 cm _________ L = 6.5 cm e = 0.262 Eccentricity e = d L -Round to nearest thousandth -NO labels

When does a planet move fastest in its orbit? When closest to Sun When does a planet move slowest in its orbit? When furthest from Sun

Area A = Area B Equal areas Kepler's Second Law Area A = Area B Equal areas eccentricity website Website 2

Explain the difference between the geo- and helio-centric models of the solar system. Helio-centric Geo-centric Earth- centered Sun- centered

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