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The Formation of Planetary Systems

The Formation of Planetary Systems. 10 Properties of Our Solar System. Each planet is relatively isolated in space. The orbits of the planets are nearly circular. The orbits of the planets lie in nearly the same plane.

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The Formation of Planetary Systems

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  1. The Formation of Planetary Systems

  2. 10 Properties of Our Solar System • Each planet is relatively isolated in space. • The orbits of the planets are nearly circular. • The orbits of the planets lie in nearly the same plane. • The direction in which the planets orbit the Sun (counter-clockwise) is the same direction in which the Sun rotates on its axis.

  3. 10 Properties of Our Solar System • The direction in which most planets rotate on their axis is roughly the same as the direction in which the Sun rotates on its axis. • Most of the known moons revolve about their parent planets in the same direction that the planets rotate on their axis.

  4. 10 Properties of Our Solar System • Our planetary system is highly differentiated. • The asteroids are very old and exhibit a range of properties not characteristic of either the inner or the outer planets or their moons. • The Kuiper belt is a collection of asteroid-sized icy bodies orbiting beyond Neptune

  5. 10 Properties of Our Solar System • The Oort-cloud comets are primitive, icy fragments that do not orbit in the plane of the ecliptic and reside primarily at large distances from the Sun.

  6. Differentiation of Planets • Inner planets • High densities • Moderate atmospheres • Slow rotation rates • Few or no moons

  7. Differentiation of Planets • Outer planets • Also called Jovian planets • Low densities • Thick atmospheres • Rapid rotation rates • Many moons

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