The Solar System Vocab
Physical Science: Concepts in Action 25.1 Exploring the Solar System 25.2 The Earth-Moon System 25.3 The Inner Solar System 25.4 The Outer Solar System 25.5 The Origin of the Solar System
Terms in this set (31)
a description of a model of the solar system in which all of the planets revolved around Earth
a description of a model of the solar system in which Earth and other planets revolved around the sun
The plane in space containing Earth's orbit
a relatively small natural body in space the revolves around a planet
(AU) a unit of distance that equals the average distance from Earth to the sun; 149,598,000 kilometers = 1 AU
an unpiloted vehicle that carries scientific instruments into space and transmits information back to Earth
the low, plat plains of basalt on the moon formed by ancient lunar lava flows
A round depression in the surface of a planet, moon, asteroid, or comet, caused by the impact of a meteoroid.
a chunk of rock that moves through the solar system
the different shapes of the illuminated side of the moon as seen from Earth
event that occurs when the shadow of one body in space, such as a planet or moon, falls on another
the darkest part of a shadow
a region of the moon's shadow that surrounds the umbra and is less dark than the umbra
the regular rise and fall of water in teh oceans
a tide at the new or full moon when the change between daily high and low tides is the greatest
a tide at the first or last quarter moon, when there is the least change between daily high or low tides
the four planets closest to the sun (Mercury, Venus, Earth, and Mars), which are similar in structure to Earth
small, rocky solar system bodies, most of which are found orbiting the sun in a region between Mars and Jupiter
region between the orbits of Mars and Jupiter where most asteroids in the solar system are found
a large, massive planet (such as Jupiter, Saturn, Uranus, or Neptune) that is composed mainly of hydrogen and helium
a disk made of many small particles of rock and ice in orbit around a planet
a wide belt beyond Pluto's orbit where objects mostly made of ice and rock orbit the sun
thought to be a very sparse sphere of comets encircling the solar system out to a distance of about 50,000 AU
a cloud of dust and gas that can eventually collapse to form one or more stars with a planetary system
a large disk-shaped cloud of dust and gas formed as the solar nebula rotated faster and flattened out
asteroid-sized bodies in the protoplanetary disk from which the planets formed by accretion
the process of adding mass in the formation of the planets by collisions between planetesimals
An object whose gravity is so strong that nothing, not even light, can escape.
A meteoroid that strikes Earth's atmosphere, usually at an altitude of about 80 kilometers, heated white- hot by friction with the atmosphere and seen from Earth as a flash of light—a "falling star."
A relatively small, rocky body that travels through space
A meteoroid that passes through the atmosphere and hits Earth's surface.
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