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Physical Characteristics of the Planet Neptune

Physical Characteristics of the Planet Neptune. by: Jonathon Carten. Location in Solar System. At the present time, Neptune is the farthest from the sun due to the demotion of Pluto to a dwarf planet.

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Physical Characteristics of the Planet Neptune

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  1. Physical Characteristics of the Planet Neptune by: Jonathon Carten

  2. Location in Solar System • At the present time, Neptune is the farthest from the sun due to the demotion of Pluto to a dwarf planet. • It is located approximately 4.54 billion kilometers from the sun and approximately 4.3 billion kilometers from Earth.

  3. Atmosphere • The atmosphere of Neptune is comprised of the following gases: • Hydrogen (H2) • Helium (He) • Methane (CH4) • Hydrogen Deuteride (HD) • Ethane (C2H6) • Ices • Ammonia (NH3) • Water (H2O) • Ammonium Hydrosulfide (NH4SH) • Methane

  4. Diameter • The diameter of Neptune is approximately 49,493 km. • This is what makes the mass what it is, 1.024x1024 kg. This is around 17.2 times that of Earth’s mass.

  5. Neptune’s Orbit

  6. Orbit Continued • On the previous slide the red represents Neptune and the center is the sun. The blue object is Uranus. • Orbital time is approximately 165 Earth years around the sun. • Orbital time on its axis is approximately 17.24 hours. • The semimajor axis orbital is approximately 30.07 AU.

  7. Weather • The surface temperature on Neptune can reach 72K (-200 degrees celsius). • In 1989, Voyager 2 found the Great Dark Spot on the planet. Five years later the Hubble Space Telescope didn’t find the spot, but instead found a similar one in the Northern Hemisphere of the planet. • Has got internal heat. Neptune radiates about 2.61 times the amount of heat it takes in from the sun.

  8. Great Dark Spot

  9. Rings • Neptune has got faint rings surrounding the planet. • Rings may consist of ice particles coated with silicates or carbon-based material. • Rings first discovered in 1968 by Edward Guinan. • Studies in 2005 showed that Neptune’s rings were more unstable than originally thought.

  10. Rings

  11. Internal Structure • Has 4 main components. • Upper atmosphere • Atmosphere consisting of hydrogen, helium and methane. • Mantle consisting of water, ammonia, and methane ices • Core consisting of rocks.

  12. Internal Structure

  13. Works Cited • For works cited, please see the works cited on the website. • www.physics121neptune.wikispaces.com

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