orbits of the planets are elliptical, planets move fastest when it is near perihelion and slowest when its near aphelion, planets more distant from the sun take longer to orbit then the sun
name and describe the theory for the formation of the universe
the big bang theory states that at one time the entire universe was confined to a dense, hot, supermassive ball. Then 13.7 billion years ago a violent explosion occured hurling this material is all directions
name and describe the theory for the formation of the solar system
nebular theory is when the sun and planets formed from a rotating disk of dust and gases
put these in order from smallest to largest: galaxy, universe, solar system, star, moon, earth.
moon, earth, star, sun, solar system, galaxy, universe
the apparent change in frequency of electromagnetic