The great contribution of Tycho Brahe was to ________.
A) offer the first detailed model of a Sun-centered solar system, thereby beginning the process of overturning the Earth-centered model of the Greeks
B) observe planetary positions with sufficient accuracy so that Kepler could later use the data to discover the laws of planetary motion
C) discover four moons orbiting Jupiter, thereby lending strong support to the idea that the Earth is not the center of the universe
D) discover that planets orbit the Sun in elliptical orbits with varying speed
Question 2
Which of the following best describes how the Drake equation is useful?
A) It tells us what wavelengths of light will be most useful to examine in the search for extraterrestrial intelligence.
B) It allows us to calculate the masses of planets orbiting other stars.
C) It has allowed us to determine the number of civilizations in the Milky Way Galaxy.
D) It helps us understand what we need to know in order to determine the likelihood of finding other civilizations.
Lung Model
Hepatic Acinus Model of Liver Function
A three-dimensional model of transfer RNA
DNA-Z computer model
A polygenic model for a threshold trait