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Kramer
Kramer, Astron. Chap. 29
| Question | Answer |
|---|---|
| Point in a planet's orbit where it is farthest from the Sun. | Aphelion |
| Metallic or silica-rich object, 1 km to 950 km in diameter, that bombarded early Earth, generating heat energy; rocky remnant of the early soar system found mostly between the orbits of Mars and Jupiter in the asteroid belt. | Asteroid |
| A planet's average distance to the Sun; for the Sun and Earth, is 1.496 x 10* km | Astronomical unit |
| Low, warm, dark-colored cloud that sinks and flows rapidly in the Jovian atmosphere. | Belt |
| Extended volume of glowing gas that forms when a comet's nucleus is heated. | Coma |
| Small, eccentrically orbiting body made of rock and ice that consists of a nucleus, a coma, and one or more tails that point away from the Sun. | Comet |
| Ratio of the distance between the foci to the length of the major axis; defines the shape of a planet's elliptical orbit. | Eccentricity |
| Large, gaseous planets that are very cold at their surfaces, have ring systems, many moons, and lack solid surfaces - Jupiter, Saturn, Uranus, and Neptune. | Gas Giant Planet |
| Form of hydrogen with both liquid and metallic properties that exists as a layer in the Jovian atmosphere. | Liquid Metallic Hydrogen |
| Streak of light produced when a meteoroid falls toward Earth and burns up in Earth's atmosphere | Meteor |
| Occurs when Earth intersects a cometary orbit and comet particles burn up as they enter Earth's upper atmosphere. | Meteor Shower |
| Small asteroid or asteroid fragment that fell on early Earth, generating heat; meteoroid that does not completely burn up in Earth's atmosphere and strikes Earth's surface sometimes causing an impact crater. | Meteorite |
| Piece of interplanetary material that falls toward Earth and enters its atmosphere. | Meteoroid |
| Small solid core of a comet. | Nucleus |
| Point in a planet's orbit where it is closest to the Sun. | Perihelion |
| Space object built of solid particles that can form planets through collisions and mergers. | Planetesimal |
| Wobble in Earth's rotational axis | Precession |
| A planet's backward motion in the sky. | Retrograde Motion |
| Rocky-surfaced, relatively small, dense inner planets closet to the Sun - Mercury, Venus, Earth, and Mars. | Terrestrial Planet |
| High, cool, light-colored cloud that rises and flows rapidly in the Jovian atmosphere. | Zone |
Created by:
marilyn.kramer
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