Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
15 Cards in this Set
- Front
- Back
|
What is archaeoastronomy?
|
The study of the astronomy of ancient peoples.
|
|
|
What is the principle of uniform circular motion?
|
The idea that the universe was made of spheres rotating at constant rates and carrying objects around in cirlces.
|
|
|
Aristotle's model of a geocentric universe is based the incorrect notion that...
|
Earth is the center of the universe.
|
|
|
What is an eccentric?
|
An off-center circular path
|
|
|
In a heliocentric universe the _______ is the center of the universe.
|
Sun
|
|
|
What is the parallax?
|
The apparent motion of an object because of the motion of the observer.
|
|
|
Ptolemy created a mathematical model of the Aristotelian universe in which a planet followed a small circle call the....
|
Epicycle.
|
|
|
In Ptolemy's mathematical model of the Aristotelian universe the epicycle slides around a larger circle called the....
|
Deferent.
|
|
|
The equant is...
|
The point at which the epicycle appears to move at a constant rate.
|
|
|
The semimajor axis (a) of an ellipse equals...
|
Half of the longest diameter
|
|
|
The eccentricity (e) of an ellipse is the...
|
Distance from either focus to the center of the ellipse divided by the semimajor axis.
|
|
|
What is Kepler's 1st law of planetary motion?
|
The 1st law states that the orbits of plants around the sun are ellipses with the sun at one focus.
|
|
|
What is Kepler's 2nd law of planetary motion?
|
The 2nd law states that a line from the planet to the sun sweeps over equal areas in equal intervals of time.
|
|
|
What is Kepler's 3rd law of planetary motion?
|
The 3rd law states that the orbital period squared is proportional to the semimajor axis cubed.
|
|
|
What is an orbital period?
|
The time is takes for a planet to travel around the sun once.
|
