NATS 1880 Chapter Notes - Chapter 9: Active Object, Tidal Locking, Orbital Period
Document Summary
The discovery of geysers on jupiter"s moon, europa has made it easier and cheaper to determine whether life exists there, says bill nye. Jovian planets (jupiter, saturn, uranus, neptune) -> not likely habitable; but their moons may be. Galilean satellites, four moons of jupiter: io, europa, ganymede, callisto. Considerable interest in being habitable: galilean satellites, titan (saturn"s largest moon), triton (neptune"s largest moon) Jovian moons orbit in the same direction as their parent planet & lie almost always in the planet"s equatorial plane. Retrograde motion in the direction opposite to the movement of something else. Ice and rock, higher concentrations of water, lower density. Dwarf planets: pluto, eris, and other objects large enough for their own gravity to have made them round. The rest of the small bodies have been categorized in two groups: asteroids and comets. Asteroid: an object that resembles a terrestrial planet in composition but is too small to count as a planet itself.
