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What Do the Outer Planets Have in Common? What Are the Characteristics of Each Outer Planet?

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Presentation on theme: "What Do the Outer Planets Have in Common? What Are the Characteristics of Each Outer Planet?"— Presentation transcript:

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2 What Do the Outer Planets Have in Common? What Are the Characteristics of Each Outer Planet?

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4  Large  Gas giants (no solid surface)

5  Hydrogen and helium  Ices of ammonia and methane  Strong gravitational forces (due to their size) keep these gases from escaping  Much of the material in gas planets is actually liquid because the pressure inside the planet is so high  The outer layers are extremely cold  Temperature increases inward with pressure

6  All outer planets have many moons  Jupiter: at least 63  Saturn: at least 61  Uranus: at least 27  Neptune: at least 13  All outer planets have rings  Thin disks of small particles of ice and rock  Saturn’s rings are largest and most complex

7  Scientists are constantly discovering new information about these planets and moons (using telescopes and space probes)

8  Largest and most massive planet  Mass is 2 ½ times more than all of the other planets combined

9  Thick atmosphere (hydrogen and helium)  Great Red Spot: Storm larger than Earth!  Similar to a hurricane  Never ending  20,000 km long and 12,000 km wide

10  Dense core of rock and iron at its center  Pressure is 30 times greater than on the surface  It has a thick mantle of liquid hydrogen and helium

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12  Jupiter’s largest moon. (Larger than Mercury)  Surface has dark and bright areas

13  Second largest  Less ice  Most craters

14  Not icy  May have 300 active volcanoes

15  Ice  Liquid water below the ice (possibly)

16  2 nd largest planet  Thick atmosphere (hydrogen and helium)

17  Made up of chunks of ice and rock going around Saturn  Some are kept in place from gravity of tiny moons

18  Titan (largest…larger than Mercury)  Thick atmosphere (nitrogen and methane)  Some features formed from flowing liquid  Mimas and Tethys: craters and trenches  Enceladus: Ice and water erupt in geysers  Phoebe: ring of material found

19  4 times diameter of Earth  Looks blue- green due to methane in atmosphere  Rings

20  The 5 largest moons have icy, cratered surfaces

21  Tilted at an angle of about 90 degrees from the vertical  The tilt is due to an object hitting Uranus and knocking it on its side  Rotation = 17 hours

22  Similar to Uranus in size and color  Blue and cold  Atmosphere contains visible clouds  Interior is hot (forming clouds and storms at the surface)

23  Great Dark Spot (about the size of Earth)  Scientists think it is probably a giant storm that lasted a short period of time

24  13 moons  Triton (largest)  Thin atmosphere  Nitrogen ice over south pole

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