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Solar System
Vocab for the unit on the solar system in earth science
30
Science
9th Grade
12/20/2010

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Cards

Term
Brahe
Definition
Mapped motions of planets
Term
Copernicus
Definition
Created heliocentric model of universe
Term
Kepler
Definition
Studied Brahe's data
Term
Jovian
Definition
The planet Jupiter
Term
Milky Way
Definition
Our galaxy which our solar system is in
Term
Ptolemy
Definition
Created geocentric model of universe
Term
Retrograde Motion
Definition
Apparant change in direction of a planet
Term
Solar System
Definition
Everything under 1 star's gravitational force
Term
Terrestrial
Definition
Earthlike
Term
Major Axis
Definition
Longest line in Ellipse that passes through both focal points
Term
Eccentricity
Definition
Measure of how elliptical an orbit is
Term
Ellipse
Definition
Key to explanation
Term
Geocentric
Definition
Everything revolves/rotates around Earth
Term
Orbit
Definition
Gravitationally curved path of an object around a point in space
Term
Galileo
Definition
Father of science - discovered Jupiter's 4 largest moons and phases of Venus
Term
Heliocentric
Definition
Planets in circular orbits around the Sun.
Term
Aphelion
Definition
Point where planet is farthest from Sun in orbit
Term
Eratosthenes
Definition
Discovered shape and circumferance of Earth
Term
Newton
Definition
Developed law of gravitation
Term
Minor Axis
Definition
Line perpendicular to Major Axis
Term
Kuiper Belt
Definition
Dwarf planets extending from the orbit of Neptune
Term
Asteroid
Definition
Ice debris floating in space
Term
Dwarf Planet
Definition
Massive enough to be a sphere
Not a satellite
Has not cleared it's orbit of debris
Term
Oort Cloud
Definition
Cloud surrounding the planetary system
Term
Interstellar Cloud
Definition
Stars inbetween clouds
Term
Comet
Definition
Icy debris that develops a tail when near the Sun
Term
Perihelion
Definition
Point where planet is closest to Sun in orbit
Term
Gravity
Definition
When objects of force attract each other
Term
Planetesimal
Definition
Planets that formed like Earth
Term
Focal Points
Definition
Two places in an ellipse
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