Astronomy exam 1 Flashcards
1
Q
universe
A
everything we know of
2
Q
cosmology
A
study of the structure of the universe
3
Q
cosmogony
A
how the universe changes with time
4
Q
theory
A
production of the future
5
Q
Eudoxus
A
guessed earth was a sphere
6
Q
Ptolemy
A
stars move east, planets move backwards for small time
7
Q
Nicholos
A
sun is center
8
Q
ellipse
A
2 points where the sum of distance from them and 2 other points remain constant
9
Q
Tycho
A
observed ellipse
10
Q
johannes kepler
A
modeled a copernican
11
Q
keplers first law
A
planets travel in elliptical orbits with the sun at on focus
12
Q
keplers second law
A
planets sweep out equal areas in equal time
13
Q
perihelion
A
closest to the sun
14
Q
aphelion
A
furthest from the sun
15
Q
celestial sphere
A
shell of stars surrounding the earth
