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T5.1 Earth-Sun-Moon

5.1 Movement in Space

TermDefinition
constellations a group of stars that forms a shape or pattern
polaris Name of the North Star
circumpolar describing any star that is always visible in the night sky
ursa major Seven of its stars form the Big Dipper.
ursa minor Constellation known as the Little Dipper that contains the star Polaris
Orion The most distinctive feature is a belt
Betelgeuse Red supergiant star in the Orion Constellation
satellite A body that orbits a planet
planet An object that orbits a star, is large enough to have become rounded by its own gravity, and has cleared the area of its orbit
meteor A streak of light in the sky produced when a small object burns up in Earth's atmosphere.
comet A loose selection of ice and dust that orbits the sun, typically in a long, narrow orbit
star A ball of hot gas, primarily hydrogen and helium that undergoes nuclear fusion.
geocentric Term describing a model of the universe in which Earth is at the center of the revolving planets and stars first developed by Aristotle and further developed by Ptolemy.
heliocentric Term describing a model of the solar system in which Earth and the other planets revolve around the sun first developed by Aristarcus and further developed by Copernicus.
ellipse shape of the orbital path's planets take as calculated by Kepler
Aristarchus ancient Greek scientist who first developed a heliocentric model of our solar system
Nicolaus Copernicus further developed heliocentric saying Earth's rotation and revolution around the sun explained stars moving
Johannes Kepler Brahe's assistant who calculated the shape of a planet's orbit is an ellipse, not a circle.
Tycho Brahe observed that planets did not move in a circle around the sun.
Galileo proved the heliocentric model to be true since Jupiter has moons that revolve around it instead of Earth.
Created by: DanetteWeisman
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