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Exo -planets. Size. Most Exo -planets are smaller than earth A common E xo -planet is around one-twelfth the size of earth (1,250-1,800 km in diameter) This is also about half the size of Pluto. Sedna 1,300-1,600 km in diameter. Quaoar 1,250 km. Pluto 2,302 km. Moon - PowerPoint PPT Presentation
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EXO-PLANETS
Size
Most Exo-planets are smaller than earth
A common Exo-planet is around one-twelfth the size of earth (1,250-1,800 km in diameter)
This is also about half the size of Pluto
Sedna1,300-1,600 km
in diameter
Quaoa
r 1,250
km
Pluto2,302 km
Moon3,476
km
Earth12,756 km
Colors and Surface Features Exo-planets all have wide ranges of
colors and surface features Sedna, a well known planet, is trans-Neptune and composed of many different elements It is one of the reddest planets Quaoar, another planet is a rocky trans-Neptune planet that is moderately red
Rotation and Revolution
Again, Exo-planet revolutions and rotations vary
Sedna a common exo-planet rotation is 10 hours, and its revolution is
around 11,400 years
The orbit of Sedna (red) set against the orbits of Jupiter (orange), Saturn (yellow), Uranus (green), Neptune (blue), and Pluto (purple)
Density Exo-planets vary in density Two common Planets, Sedna and
Quaoar have densities that are very similar
Sedna has a density of about 2.0 g/cm3 Quaoar has a density of 2.2 g/cm3
This is about ½ the density of Earth
Sedna Quaoar Pluto Earth0123456
Density
Density
Gravity Exo- Planets have ranges of gravity Sedna’s gravitational pull is about
0.27 m/s2
Quaoar’s gravitational pull is around 0.376m/s 2
Earth’s gravity is 9.78 m/s² In relation, you would practically fly on
Sedna and Quaoar, since there pull is 1/10 that of Earth’s
Sedna Quaoar Earth02468
1012
Gravity
Gravity
Atmospheric Composition
Atmospheres on exo-planets can vary often
Sedna, a common exo-planet does not have an atmosphere, but might contain one someday
Quaoar, another example, also does not contain a known atmosphere
Both may one day posses an atmosphere due to elements presentInterpretation of the view of
the sun form Sedna
Surface Composition
Most exo-planets surfaces are rocky and terrestrial
Due to limits on space technology there are limits on what we know about the surface composition of exo-planets
Interpretation of
Quaoar’s surface
Interior Composition
A majority of exo-planet interior’s are composed of ice-like materials, and a solid, rocky core
Quaoar’s Interior
Magnetic Field
Again, detecting the magnetic fields of exo-planets around us is highly complicated
So far no magnetic fields have successfully been proven as detecting them is very complex
All exo-planets are thought to have a magnetic field
Moons
Variation in the amounts of moons is common in exo-planets
Sedna, for example, has no known moons
Quaoar, has one moon, called Weywot, its revolution is around 12.9 days and has an equatorial diameter of about 85 kmWeywot,
Quaror’s moon, is theorized to appear like so
Unique Features of Exo-planets
Exo- means outside There are over 200 known exo-
planets Exoplanet: a planet that orbits the
sun outside Pluto or another star
Exo-planet 51 Pegasi B, one of the first discovered exo-
planets
ExoplanetsSize: Usually smaller than Earth Sedna: 1,300-1,600 km Quaoar: 1,250 kmColor/Surface Features: wide range……commonly red
Rotation: Sedna: 10hours Revolution: Sedna: 11,400 yearsDensity: about ½ of earth’s density
Gravity: most are 1/10 that of earth
Atmospheric Composition: Little to no atmosphere
Surface Composition: Rocky terrestrial surface, probably icy
Interior Composition: Unverified, probably icy mantle, rocky solid core
Magnetic Field: all exo-planets thought to have a magnetic field
Moons: None to many Sedna: None Quaoar: 1/Weywot/85km diameterUnique Features: over 200 known exo-planets
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