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Universe/Solar Sys

Integrated Science

TermDefinition
Astronomy scientific study of the universe
Galaxy a collection of stars, dust, and gas bound together by gravity
Astronomical Unit the average distance between Earth and the sun; approximately 150 million kilometers
Electromagnetic Spectrum all of the frequencies or wavelengths of electromagnetic spectrum
Cosmic Background Radiation a radiation uniformly detected from every direction in space; considered a remnant of the big bang
Solar System the sun and all of the planets and other bodies that travel around it
Solar Nebula a rotating cloud of gas and dust from which the sun and planets formed; also any nebula from which stars and exoplanets may form
Orbital Period the time required for a body to complete a single orbit
Eccentricity the degree of elongation of an elliptical orbit
Inertia the tendency of an object to resist a change in motion an outside force acts on the object
Planetesimal a small body from which a planet originated in the early stages of development of the solar system
Planet a celestial body that orbits the sun, is round because of its own gravity, and has cleared the neighborhood around its orbital path
Asteroid a small, rocky object that orbits the sun; most asteroids are located in a band between the orbits of Mars and Jupiter
Comet a small body of ice, rock, and cosmic dust that follows an elliptical orbit around the sun and that gives off gas and dust in the form of a tail as it passes close to the sun
meteoroid a relatively small, rocky body that travels through space
Meteor a bright streak of light that results when a meteoroid burns up in Earth's atmosphere
Created by: Schim
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