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Solar System

Horizontales
a planet's apparent backward movement in the sky
Ratio of the distance between the foci to the length of the major axis; defines the shape of a planet's elliptical orbit
Piece of interplanetary material that falls toward earth and enters its atmosphere
Form of hydrogen with both liquid and metallic properties that exists as a layer in the Jovian atmosphere
Space object built of solid particles that can form planets through collisions and mergers
The average distance between the sun and the earth
an oval that is centered on 2 points called foci; the shape of planets' orbits
Streak of light produced when a meteoroid falls toward earth and burns up in earth's atmosphere
Low, warm, dark colored cloud that sinks and flows rapidly in the Jovian atmosphere
Region of the space that lies outside the orbit of Neptune
Verticales
Occurs when earth intersects a cometary orbit and comet particles burn up as they enter earth's upper atmosphere
Rocky-surfaced, relatively small, dense inner planets closest to the sum--Mercury, Venus, earth, mars
A small fragment of an orbiting body that has fallen to earth, generating heat
Large, gaseous planet that is very cold at its surface, has ring systems, many moons, and lacks solid surfaces--Jupiter, Saturn, Uranus, Neptune
An object that, due to its own gravity, is spherical in shape, orbits the sun, is not a satellite, and has not cleared the area of its orbit of smaller debris
High, cool, light colored cloud that rises and flows rapidly in the Jovian atmosphere
Small, eccentrically orbiting body made of rock and ice which have one or more tails that point away from the Sun
A line of cliffs produced by erosion or faulting