University:
Eastern Kentucky University
Course:
AST 135 | Introductory Astronomy
Academic year:

2023
Views:

79

Pages:

1
Author:

Carissa Thomas

How Galileo proved the heliocentric model? Via astronomical observations using a telescope If the planet moves in a circular orbit, the orbital speed of the planet is ____ Constant How did Galileo led to the idea that Earth is a planet, a celestial body not so different with other large objects in the sky? By observing the craters, mountains, valleys, and dark areas on the Moon, similar to what Earth has If the two foci in the ellipse have the same location, the distance between the foci would be ___ and the eccentricity would be ____, giving the shape of a _____ How did Venus was used to prove the heliocentric model? Venus undergo phases similar to the Moon, a scenario only possible (and has been observed) if Venus revolved around the Sun In Time Dilation, the lightspeed moving object has _____ time than the stationary object slower 0; 0; circle In an ellipse, the ___ of the distance of two ___ to any point on the ellipse is always the same In his astronomical observatory in Hven Island, he made continuous records of the positions of the Sun, Moon, and planets for almost 20 years sum; foci In orbital speed: a planet _____ as it comes closer to the Sun and ______ as it pulls away from the Sun speeds up; slows down Tycho Brahe Isaac Newton developed this mathematical tool to solve how gravitational effects are affected by distance between bodies Its brightness depends on whether its large rings are seen nearly edge-on (faint) or more widely opened (bright) Calculus Saturn Kepler's first law formula (r = planet-star distance, e = eccentricity, a = major axis, theta = true anomaly) Kepler's first law: Each planet moves around the Sun in an orbit that is an ellipse, with the ___ at one focus of the ellipse Kepler's law: a planet's orbital period squared is proportional to the semimajor axis of its orbit cubed (P^2∝a^3) Sun Kepler's third law Kepler discovered the real shape of the planet's orbits, which is ____ Ellipse r = [a(1-e^2)]/[1+e cos theta]