Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Physics Section 7.3 Apply Kepler*s Laws of Planetary
Document related concepts
Extraterrestrial life wikipedia , lookup
Rare Earth hypothesis wikipedia , lookup
Dialogue Concerning the Two Chief World Systems wikipedia , lookup
Tropical year wikipedia , lookup
Corvus (constellation) wikipedia , lookup
Formation and evolution of the Solar System wikipedia , lookup
History of Solar System formation and evolution hypotheses wikipedia , lookup
Astronomical unit wikipedia , lookup
Discovery of Neptune wikipedia , lookup
Geocentric model wikipedia , lookup
Planets in astrology wikipedia , lookup
Aquarius (constellation) wikipedia , lookup
Copernican heliocentrism wikipedia , lookup
Satellite system (astronomy) wikipedia , lookup
IAU definition of planet wikipedia , lookup
Planet Nine wikipedia , lookup
Planetary habitability wikipedia , lookup
Definition of planet wikipedia , lookup
Transcript
Physics Section 7.3 Apply Kepler’s Laws of Planetary Motion The Polish astronomer Nicolas Copernicus was the first to correctly place the sun at the center of our solar system. Johannes Kepler perfected the Copernicus model by devising three laws of planetary motion. 1st Law: Each planet travels in an elliptical orbit around the sun and the sun is at one of the focal points 2nd Law: An imaginary line drawn from the sun to the planet sweeps out equal areas in equal times. 3rd Law: The square of the planet’s orbital period (one year) is proportional to the cube of the average distance between the planet and the sun. T2 = or T= and vt = Gm r T = period (s) m = mass of star(object being orbited) (kg) r = average distance from planet to sun G = 6.67 x 10-11 N m2/kg2 example A large planet orbiting a distant star is discovered. The planet’s orbital distance is 7.5 x 1010 m, and its period is 105.5 days. Calculate the mass of the star and the planets orbital speed. example A satellite is to orbit above the Earth at an altitude of 350 km. Find the velocity required to maintain a circular orbit. What is the period of the orbit? assignment page 253 Problems 1,2,5,6,7
