University:
Murray State University
Course:
AST 115 | Introductory Astronomy
Academic year:

2024
Views:

268

Pages:

1
Author:

Izabella F.

Helocentric modle Ast115 1-31-24 nicholas Copernicous (1473-1543 -Clamed the sun was at the center of our Solar System -planets move incircles -Didnt match observations. Tycho Brahe (1546-1601) - most percikate naked eye observations of Planet Position. -Saw a "new" star Supernova) heavens Could not macher Parallax => Earth wore Can't move Changing Johannes Kepler (1571-1630) -used Ty cho's Data to show planets move in Eccipses around the sun. Keplers 3 Laws of Planetary motion. Dorbits of planets are Ellipses with the sun at onefoouse. Eccentricity=e 70 for Coril ar * ③ A planet Sweeps out Equail area in Equal time (moves fast when its close to the Sun & then slow when is far away) ③ A Planet's orbital period (1) Squared is called to its Average distance from the Sun (a) Cubed