Chapter 20 Our Solar System Inner Planets Inner
- Slides: 19
Chapter 20: Our Solar System
Inner Planets • Inner Planets often called Terrestrial Planets • Rock Planets – Mercury – Venus – Earth – Mars • Asteroid Belt separates inner and outer planets
Outer Planets • Outer Planets known as Giants or Jovian – Jovian means “Jupiter like” • Have rings • Comprised mainly of Gases – Jupiter – Saturn – Uranus – Neptune
Mercury
Mercury • • • Smallest terrestrial planet and closest to Sun Mercury day = 59 Earth days Mercury year = 88 Earth Days Surface marked by craters Planet of extremes – Day = 700 K – Night = 100 K or -170°C
Venus
Venus • Density and internal structure similar to Earth – Often called “Earth’s Twin” – Also known as the Morning and Evening Star • Venus day = 243 Earth Days • Venus year = 225 Earth Days • Hottest surface of any planet = 740 K – Accelerated greenhouse effect, dense atmosphere • Sun rises in West and sets in the East
Mars
Mars • • • 4 th planet and last of the inner Mars day = 24. 6 Earth Hours Mars year = 1. 88 Earth Years Has Polar Ice caps Axis tilt allows for seasons Contains two Moons – Phobos and Deimos
Jupiter
Jupiter • • • Largest and Most Massive Planet Jupiter Day = 9. 93 Earth hours Jupiter year = 11. 9 Earth years The “Great Red Spot”, storm within atmosphere Strongest surface gravity of planets Io, Europa, Callisto and Ganymede discovered by Gallileo – Io volcanically active – Europa has icy crust hiding liquid
Saturn
Saturn • • • 2 nd largest planet Saturn day = 10. 6 Earth hours Saturn year = 29. 4 Earth years Has most spectacular rings of any planet Moon Titan is larger than Mercury
Uranus
Uranus • Uranus rotates top to bottom – Thought to have been struck by an asteroid • Uranus day = 17. 2 Earth hours • Uranus year = 83. 8 Earth years • Discovered in 1781 by William Herschel
Neptune
Neptune • • Similar is size and shape to Uranus Neptune day = 16. 1 Earth hours Neptune year = 164 Earth years Cold, blue planet containing visible clouds – Scientists think Neptune is shrinking, causing energy to be released into atmosphere creating storms • Moon triton orbits Neptune backwards – Contains erupting geysers
Pluto
Pluto and Dwarf Planets Furthest “Planet” from sun Pluto day = 6. 39 Earth days Pluto year = 248 Earth years Made mainly of “Ices” Orbits closer to the Sun than Neptune for 20 years • Rotates with its moon Charon • Considered a Kuiper Belt object • • •
- What are the four inner planets
- Solar system jeopardy
- What is each planet made of
- Inner terrestrial planets
- Solar system inner and outer planets
- By listening to my inner defender voice i can be sure that
- Five outer planets
- Are jovian planets more dense than terrestrial
- What are the inner and outer planets
- Solar system planets
- Solar system
- Chapter 29 our solar system
- Chapter 28 our solar system
- Chapter 23 touring our solar system
- Chapter 28 our solar system
- Inner outer planets venn diagram
- How are the inner planets alike
- Eighth planet from the sun
- Inner planets characteristics
- What separates the inner and outer planets