Transcript MERCURY

THIS PRESENTAION HAS BEEN RATED
TG-13
TEACHERS’ GUIDANCE STRONGLY ADVISED
Some Material May Be Unintelligible For Students Under 13.
Intense Frames of Scientific Instruction, Analysis, Comparing
and Contrasting, Description, and for Some Vocabulary.
BY THE
CLASSIFICATION AND RATING ADMINISTRATION
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ASTRONOMY
Small System
Bodies
OBJECTIVES
By the end of this presentation, students will
be able to
• explain why Pluto is no longer classified as
a planet;
• list four physical features of each small
system body.
Small Solar System Bodies
P
L
PLUTO
P
L
The First Dwarf Planet
PLUTO
Distance: 3,666 million miles
Revolution: 248.5 years
Rotation: 6.39 days - retro
Radius: 721 miles
Volume: 0.01×Earth
Mass: 0.002×Earth
Density: 2 g/cm3
PLUTO
Escape Velocity: 0.6 mi/s
Surface Temp.: ave. -370ºF
Moons: 5 – Charon, Styx, Nix, Keberos,
Hydra
Atmos.: Maybe none; maybe very thin similar to Triton’s.
PLUTO
Features: Rocky core with a crust of
frozen methane.
Since its moon, Charon, is close to the
same size, and orbital proximity, they
could be considered a double planet.
Other Dwarf Planets include:
•
•
•
•
•
•
•
Ceres
Eris
Haumea
Makemake
Sedna
Xena
Quaoar
Eris and its moon, Dysnomia
Asteroids
Minor Planets
Asteroids - the minor planets.
1 Vesta - brightest, third largest.
2 Pallas - second brightest.
3 Ceres - third brightest, largest (567 mi dia.).
5145 Pholus - farthest from the sun ( 1,881 mill. mi).
433 Eros - closest to the sun.
620 Geographos - closest approach to earth is 3
million miles. Asteroid is 2.4 mi in dia.
2062 Aten - orbit is most similar to Earth’s
4147,4148,4149,4150 - the fab four.
951 Gaspra
243 Ida and Dactyl
433 Eros
4 Vesta
Comets
And other Small Solar System Bodies
Exoplanets
Planets orbiting other stars
ASTRONOMY
Small System
Bodies