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