sci post test

galaxy

huge collection of gas, dust and billions of stars and their solar systems

solar system

consists of the sun and everything that orbits/travels around it

star

giant sphere of gas

a stars life cycle is determed by

size and mass of the star

jovain planets

planets that are made up of gas

terrestial planets

planets made up of solid rock

some jovain planets are

Jupiter, Saturn, Uranus, and Neptune

some terestial planets are

Mercury, Venus, Earth and Mars

orbital velocity

speed of orbit

gravitational force (pull) depends on

mass and distance