eccentricity of orbits

terrestrial planets CHARACTERISTCS (5)

close to sun - mostly solid - small diameters - high densities - no rings and few moons

jovian planets CHARACTERISTICS (5)

far from sun - mostly gases - large diameters - low density - many moons and rings

terrestrial PLANETS

earth mars mercury venus

jovian PLANTETSHFS

neptune uranus saturn jupiter

keplers first law

all planets travel in elliptical orbits with the sun at one of the two focis

if something is more elliptical...

higher eccentricity and less circular

if something is less elliptical...

lower eccentricity and more circular

keplers second law

each triangle will have the same area and same time

keplers third law

the distance between the foci divided by the length of the major axis is the eccentricity

planets

large objects that orbit the sun

moons

a body that orbits a planet/asteroid as they orbit the sun

asteroid

solid rocky object that orbits the sun with no atmosphere an irregular shape and are smaller than planets

coments

compared to a dirty snowball composed of solids that change to gasses when heated

meteroids

small solid fragments that orbit the sun and when they burn up they leave a visible streak

eccentricity

measure of how elliptical a planet's orbit is

ellipitcal

how far something is from being a perfect circle

perihelion vs. aphelion

p: closest to sun a: farthest from sun

distance between foci and eccenticity

higher distance, higher eccentricity

objects closer to the sun are...

less eccentric, planet spins faster, stronger force

a planets average distance from the sun has to do with the...

period of revolution