1 / 11

Outer Planets

Outer Planets. Outer Planets. The outer planets are called Jovian or Jupiter-like. M ade of gas and are several times MORE massive than the Earth. Grew to present size in about 10 million years. When studying outer planets you must take into account their SIZE and POSITION .

sydney
Télécharger la présentation

Outer Planets

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Outer Planets

  2. Outer Planets • The outer planets are called Jovian or Jupiter-like. • Made of gas and are several times MORE massive than the Earth. • Grew to present size in about 10 million years. • When studying outer planets you must take into account their SIZE and POSITION.

  3. Formation Idea- 1 • Jovian planets formedmainly from the GAS in the solar nebula. • Rotating gas and dust of solar nebula became unstable and formed the outer planets by direct gravitational collapse. • Form from the gas without first forming a dense core by accretion.

  4. Formation Idea- 2 • The Jovian planets formed in the outer solar nebula • Lower temperatures allowed the gas to form large amounts of ice. (Three times more ices than silicates for inner planets) • The Jovian planets then grew rapidly and became massive. • Had enough gravity to attract large amounts of nebular gas and so a large amount of helium and hydrogen

  5. Jupiter layers

  6. Position (orbit migration) • The four Jovian planets may have formed closer to the sun in the same area • Where Jupiter and Saturn currently are • Gravitational interactions shift Jupiter slightly inward and Saturn slightly outward. • Event forces Uranus and Neptune to migrate rapidly outward to their present orbits.

  7. Orbital Migration cont. • Migration would have happened over many millions of yrs. • It effected smaller objects dramatically. 1. pushed the Kuiper belt objects to larger orbits. 2. flung many planetesimalsinto highly elliptical orbits, and they hit planets.

  8. Effects of positionasteroids • Jupiter grew massive and due to position, gravitationally disturbed the motion of close by planetesimals. • These bodies should have formed a planet but were thrown into the sun or out of the solar system. • The asteroids we see today are the last remains of the rocky planetesimals.

  9. Effects of positioncomets • Comets are the last of the icy planetesimals. • Some comets formed in the outer solar nebula beyond Neptune. • Many comets were ejected far into the outer solar system by the massive Jovian planets

  10. satellite (moon) systems • Large satellite systems of the Jovian planets contain two kinds of moons. • Moons formed in orbit around the forming planet. • Moons may be captured planetesimals and asteroids.

  11. Ring systems • A large mass makes it easier for a planet to hold onto orbiting ring particles. • If farther from the sun, the particles are not as easily swept away by the pressure of sunlight and the solar wind. • Reason why no rings are around inner planets and are found around outer planets.

More Related