The Planets and the Solar System 27 CHAPTER The Planets and the Solar System EXIT CHAPTER 27.1 The Inner Planets 27.2 The Outer Planets 27.3 Planetary Satellites 27.4 Solar-System Debris CHAPTER OUTLINE

27 27.1 The Inner Planets The Planets and the Solar System CHAPTER The Planets and the Solar System CHAPTER HOME 27.1 The Inner Planets VOCABULARY The planets are grouped by position as inner or outer, and by properties as terrestrial or Jovian. inner planets outer planets The inner planets are Mercury, Venus, Earth, and Mars. They are all terrestrial: they have rocky crusts, dense mantle layers, and very dense cores. Mercury Venus Earth Mars Asteroid Belt The Inner Planets SECTION OUTLINE

27 The Planets and the Solar System inner planets CHAPTER The Planets and the Solar System CHAPTER HOME VOCABULARY inner planets outer planets inner planets The four planets nearest the sun, separated from the outer planets by the asteroid belt. SECTION OUTLINE

27 The Planets and the Solar System outer planets CHAPTER The Planets and the Solar System CHAPTER HOME VOCABULARY inner planets outer planets outer planets The five planets farthest from the sun and separated from the inner planets by the asteroid belt. SECTION OUTLINE

27 27.2 The Outer Planets The Planets and the Solar System CHAPTER The Planets and the Solar System CHAPTER HOME 27.2 The Outer Planets The Jovian, or outer, planets are large, consist mostly of gases, and are surrounded by ring systems and many moons. They are Jupiter, Saturn, Uranus, and Neptune. Asteroid Belt Jupiter Saturn Uranus Neptune Pluto The Outer Planets Pluto is too small to be a Jovian planet and not dense enough to be a terrestrial planet. SECTION OUTLINE

27 27.3 Planetary Satellites The Planets and the Solar System CHAPTER The Planets and the Solar System CHAPTER HOME 27.3 Planetary Satellites A planetary satellite or moon is a smaller body that revolves around a planet. Except for Venus and Mercury, each planet has at least one satellite. Jupiter’s four largest moons, Io, Europa, Ganymede, and Callisto, have yielded some surprising discoveries, such as ice covering Europa and volcanoes on Io. Galilean Satellites of Jupiter Io Europa Ganymede Callisto SECTION OUTLINE

27 27.3 Planetary Satellites The Planets and the Solar System CHAPTER The Planets and the Solar System CHAPTER HOME 27.3 Planetary Satellites A planetary satellite or moon is a smaller body that revolves around a planet. Except for Venus and Mercury, each planet has at least one satellite. Jupiter’s four largest moons, Io, Europa, Ganymede, and Callisto, have yielded some surprising discoveries, such as ice covering Europa and volcanoes on Io. The Cassini-Huygens expedition has returned a wealth of new information on Saturn’s moons, especially Titan. SECTION OUTLINE

27 27.4 Solar-System Debris The Planets and the Solar System CHAPTER The Planets and the Solar System CHAPTER HOME 27.4 Solar-System Debris VOCABULARY The solar system also includes debris such as comets, asteroids, and meteoroids. comet asteroid meteor Haley’s Comet meteorite meteor shower Asteroid 243 Ida SECTION OUTLINE

27 27.4 Solar-System Debris The Planets and the Solar System CHAPTER The Planets and the Solar System CHAPTER HOME 27.4 Solar-System Debris VOCABULARY The solar system also includes debris such as comets, asteroids, and meteoroids. comet asteroid meteor Meteorites are meteoroids that survive the trip through Earth’s atmosphere. meteorite meteor shower An impact crater is a bowl-shaped depression that remains after a meteoroid or other debris strikes a planet or moon. SECTION OUTLINE

27 The Planets and the Solar System comet CHAPTER The Planets and the Solar System CHAPTER HOME VOCABULARY comet asteroid comet meteor A mass of rock, ice, dust, and gas traveling around the sun, usually in a highly eccentric orbit. meteorite meteor shower SECTION OUTLINE

27 The Planets and the Solar System asteroid CHAPTER The Planets and the Solar System CHAPTER HOME VOCABULARY comet asteroid asteroid meteor A solid, rocklike mass that revolves around the sun; most asteroids are found between the orbits of Mars and Jupiter. meteorite meteor shower SECTION OUTLINE

27 The Planets and the Solar System meteor CHAPTER The Planets and the Solar System CHAPTER HOME VOCABULARY comet asteroid meteor meteor The light made by a meteoroid as it passes through Earth’s atmosphere. meteorite meteor shower SECTION OUTLINE

27 The Planets and the Solar System meteorite CHAPTER The Planets and the Solar System CHAPTER HOME VOCABULARY comet asteroid meteorite meteor The part of a large meteoroid that survives its trip through the atmosphere and strikes Earth’s surface. meteorite meteor shower SECTION OUTLINE

27 The Planets and the Solar System meteor shower CHAPTER The Planets and the Solar System CHAPTER HOME VOCABULARY comet asteroid meteor shower meteor A large number of meteors entering and burning up in the atmosphere; meteor showers take place when Earth passes through a debris field. meteorite meteor shower SECTION OUTLINE

27 The Planets and the Solar System I. The Inner Planets CHAPTER The Planets and the Solar System CHAPTER HOME VOCABULARY I. The Inner Planets inner planets A. Two Planetary Neighborhoods outer planets B. Mercury C. Venus D. Mars KEY IDEA SUMMARY

27 The Planets and the Solar System II. The Outer Planets CHAPTER The Planets and the Solar System CHAPTER HOME II. The Outer Planets A. The Jovian Planets B. Jupiter C. Saturn D. Uranus E. Neptune, Pluto, and Charon KEY IDEA SUMMARY

III. Planetary Satellites 27 CHAPTER The Planets and the Solar System CHAPTER HOME III. Planetary Satellites A. Satellites of Earth and Mars B. Jupiter’s Moons C. Saturn’s Moons D. The Moons of Uranus and Neptune KEY IDEA SUMMARY

IV. Solar-System Debris 27 CHAPTER The Planets and the Solar System CHAPTER HOME VOCABULARY IV. Solar-System Debris comet A. Comets and TNOs asteroid B. Asteroids meteor C. Meteors and Meteoroids meteorite D. Meteorites meteor shower E. Impact Craters KEY IDEA SUMMARY

27 The Planets and the Solar System CHAPTER The Planets and the Solar System CHAPTER HOME This is the end of the chapter presentation of lecture notes. Click the CHAPTER HOME button or exit the presentation.