Dwarf planets
Upcoming SlideShare
Loading in...5
×

Like this? Share it with your network

Share

Dwarf planets

  • 2,476 views
Uploaded on

Lecture for the dwarf planets Ceres, Pluto, Haumea, Makemake, and Eris

Lecture for the dwarf planets Ceres, Pluto, Haumea, Makemake, and Eris

More in: Education
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
  • ano po ba yung 4 na dumagdag sa dwarf planet ?
    Are you sure you want to
    Your message goes here
No Downloads

Views

Total Views
2,476
On Slideshare
2,476
From Embeds
0
Number of Embeds
0

Actions

Shares
Downloads
73
Comments
1
Likes
3

Embeds 0

No embeds

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
    No notes for slide

Transcript

  • 1. Dwarf Planets Solar System Debris
  • 2. Planets vs Dwarf Planets
    • Planets
      • Orbits the Sun directly
      • Massive enough to be rounded by its own gravity
      • Has cleared the smaller bodies from its orbit
    • Dwarf Planets
      • Orbits the Sun directly
      • Massive enough to be rounded by its own gravity
      • Has not cleared the smaller bodies from its orbit
  • 3. Official Dwarf Planets
    • 1. Ceres – discovered on January 1, 1801 (45 years before Neptune),
    • 2. Pluto – discovered on February 18, 1930,.
    • 3. Eris – discovered on January 5, 2005.
    • 4. Haumea – discovered on December 28, 2004. Makemake – discovered on March 31, 2005.
    • 5.
  • 4. The Dwarf Planets in Comparison Name Diameter relative to Luna Mass relative to Luna Density (Kg/m 3 ) Temperature (K) Orbital period (yrs) Ceres 28% 1.3% 2080 167 4.6 Pluto 69% 17.8% 2000 44 248 Haumea 33% 5.7% 2600-3300 32 285 Makemake 43% ~5%? ~2000? ~30 309 Eris 78% 22.7% 2300 42 557
  • 5. Ceres
    • Found in the asteroid belt in 1801
    • Considered a planet for half a century before reclassification as an asteroid.
    • Once considered the largest asteroid
    • Classified as a dwarf planet on September 13, 2006.
  • 6. Ceres - The numbers
      • Contains 1/3 the total mass of all the asteroids
      • Orbital Period: 4.6 years
      • Semi-major axis: 2.8 AU
      • Diameter: 950 Km
      • Temperature: 167 K
  • 7. Ceres – Discovery
    • Possibility of its existence first suggested in 1772
    • Discovered in 1801 by Giuseppe Piazzi
    • Named for the Roman goddess of plants
  • 8. Ceres - Characteristics
    • Surface like a C-class asteroid
    • Possibly differentiated interior?
    • Bright spot of unknown composition
    • Possible tenuous atmosphere and frost
  • 9. The Dawn Mission
    • Will study asteroids Vesta and Ceres
    • Will arrive at Vesta in July 2011
    • Will arrive at Ceres in February 2015
  • 10. Kuiper Belt Objects (KBO)
    • AKA: Trans-Neptunian Objects (TNO)
    • Comet-like material
    • Disk beyond Neptune
  • 11. Pluto
    • Considered the 9 th planet from 1930 to 2006
    • Classified as a planet for 76 years.
    • Named for Roman god of the underworld
    • Reclassified as a dwarf planet on August 24, 2006
    • Became the first dwarf planet
  • 12. Pluto - Discovery
    • Observations of Neptune showed that something was perturbing its orbit
    • In 1906 the Lowell Observatory began a search for “Planet X”
    • Clyde Tombaugh discovered Pluto in 1930 using a blink comparator
  • 13. Pluto - Discovery
  • 14. Pluto in the blink comparator
  • 15. Pluto - The numbers
      • Orbital Period: 248 years
      • Semi-major axis: 39 AU
      • Diameter: 2300 Km
      • Temperature: 44  K
      • 3 known moons
        • Charon : more than ½ the size of Pluto
        • Nix
        • Hydra
  • 16. Pluto – The Orbit
    • Highly eccentric
      • Inside Neptune from 79-99
    • Tilted 17º from ecliptic
  • 17. Pluto – What is it really?
    • Highly eccentric orbit
    • +Atmosphere thaws and freezes depending on distance from Sun
    • +Highly inclined from ecliptic
    • = comet
  • 18. Haumea
    • A plutoid
      • Dwarf planets beyond Neptune
    • Named after the goddess of the island of Hawaii
    • Has two known moons
  • 19. Haumea - Discovery
    • Discovered in 2004 by Mike Brown at CalTech
    • Discovery first announced by a Spanish team …BUT!
    • They stole the data
    • Accepted as a dwarf planet on September 17, 2008.
  • 20. Haumea’s Shape
    • Spins very fast
      • A rotation in 4 hours
    • This rotation causes it to deform
    • Formed into football shape
  • 21. Haumea – the numbers
      • Orbital Period: 285 years
      • Diameter: ~1400Km
      • Semi-major axis: 43.1 AU
      • Temperature: <50 K
  • 22. Makemake
    • Plutoid
    • Named for the creator god of Easter Island
    • No known satellites
      • Unique among large KBOs
  • 23. Makemake - Discovery
    • Discovered in 2005 by Mike Brown at CalTech
    • Further from ecliptic than other dwarfs
    • Accepted as a dwarf planet on July 11, 2008.
  • 24. Makemake – the nubmers
      • Orbital Period: 309 years
      • Semi-major axis: 43.1 AU
      • Inclination: 29º
      • Diameter: 1500Km
      • Temperature: 30-35 K
  • 25. Eris
    • Largest dwarf planet in solar system
    • 27% more massive than Pluto
    • Named for Greek goddess of discord
  • 26. Eris - Discovery
    • Discovered in 2005 by Mike Brown at CalTech
    • Called the &quot;tenth planet” in media reports
    • Originally named Xena
    • Accepted as a dwarf planet on September 13, 2006.
    Eris? Really? Me again.
  • 27. Eris – The numbers
      • Orbital Period: 557 years
      • Semi-major axis: 68 AU
      • Diameter: 2400? Km
      • Temperature: 42.5 K
      • 1 known moon
        • Dysnomia
  • 28. Other Trans-Neptunian Objects
  • 29. Pluto’s Demise