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;
17 Cards in this Set
- Front
- Back
|
aphellion |
The perihelion is the point in the orbit of a planet, asteroid, comet or other sun-orbiting body where it is nearest to the su |
|
|
asteroid belt |
The asteroid belt is the region of the Solar System located roughly between the orbits of the planets Mars and Jupiter. |
|
|
coma |
A comet's nucleus, or heart, is the solid chunk of something in the center of its fuzzy |
|
|
copernicus |
formulated a model of the universe that placed the Sun rather than the Earth at its cente |
|
|
foci |
An ellipse has two focus points. The word foci (pronounced 'foe-sigh') is the plural of 'focus'. One focus, two foci.g |
|
|
geocentric |
having or representing the earth as the center, as in former astronomical systems. |
|
|
keplers first law |
The orbit of a planet is an ellipse with the Sun at one of the twofoci. |
|
|
second law |
A line segment joining a planet and the Sun sweeps out equal areas during equal intervals of time.[1]r |
|
|
third law |
The square of the orbital period of a planet is proportional to the cube of the semi-major axis of its orbit.m |
|
|
major axis |
The longest diameter of an ellipse. |
|
|
nebular thoery |
The nebular hypothesis is the most widely accepted model in the field ofcosmogony to explain the formation and evolution of the Solar System. It suggests that the Solar System formed from nebulous material in space |
|
|
nucleous of comets |
popularly termed a dirty snowball or an icy dirtball |
|
|
open universe |
universe that keeps expanding with big crunches |
|
|
oscilitating universe |
The Oscillating Universe Theory is a cosmological model that combines both the Big Bang and the Big Crunch as part of a cyclical even |
|
|
parralax |
Parallax is a displacement or difference in the apparent position of an object viewed along two different lines of sight |
|
|
plantesimals |
Planetesimals /plænɨˈtɛsɨməlz/ are solid objects thought to exist in protoplanetary disks and in debris diskss |
|
|
solar nebula |
the creation of our solar system |
