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8 Sci Ch 10 Test 10

absolute magnitude the apparent magnitude that star would have to an observer located 10 parsecs from the star
Aldebaran Taurus
Altair, Deneb and Vega stars that form the Summer Triangle
Andromeda galaxy largest galaxy in the Local Group
asterism small group of stars that is used to form a picture or represent an object
asteroid belt large ring of asteroids located between the orbits of Mars and Jupiter
astronomical unit unit of measurement that is equal to the distance between the sun and the earth
astronomy study of God's creation beyond the atmosphere
barred spiral shape of the Milky Way galaxy
Betelgeuse Orion
black hole an object so massive and dense that not even light can escape its gravity
Castor Gemini
celestial sphere imaginary sphere with Earth at the center and the heavenly bodies on its inner surface
circumpolar describes a star that is always above the horizon to an observer at a particular location
coma the cloud of gas and dust that surrounds the center of a comet
comets frozen chunks of ice and dust that orbit the sun
Deimos and Phobos Mars's moons
ellipses symmetrical oval shape of planets orbits
full moon moon phase the entire sunlit side is visible
Ganymede largest moon in our solar system
geocentric earth-centered view of the universe
granules convection cells that cover the sun's visible surface
Hertzsprung-Russell diagram two-dimensional graph comparing stars by their temperature and brightness
Isaac Newton developed the law of universal gravitation
Jupiter planet that shares an orbit with the Trojan asteroids
Kuiper belt group of small, icy objects orbit the sun outisde the orbit of the outermost planet
lunar month name for the period of time that the moon takes to the orbit of earth
main sequence category of stars that includes the sun
mare Latin word used to refer to the lunar "seas"
Mars notable feature is Olympus Mons
Mercury fastest-moving planet
meteor small rock from space that is burning up as it passes through Earth's atmosphere
nebula large cloud of gas and dust in space
Neptune the outermost planet in our solar system
parallax the apparent change in the position of an object daused by an actual change in the position of the observer
perihelion planet's closest approach to the sun
photosphere visible portion of the sun
Polaris Ursa Major
pulsar a rapidly rotating star that emits directional beams of radio waves
Regulus Leo
retrograde describes a planet that rotates backwards on its axis
satellite an object that orbits another object
Saturn known for its ring system
Sirius Canis Major
solar eclipse phenomenon when the moon passes between the sun and the earth
Spica Virgo
spicules the flamelike columns of gas that continually erupt from the lowest layer of the sun's atmosphere
supernova explosion of a star
third law the scientific law which dstates the relationship between a planet's period and average distance from the sun
Uranus gas giant that seems to lie on its side
Vega Lyra
Venus sometimes called the "morning star" and "evening star"
zodiac imaginary "band" in the sky in which the sun, moon and planets travel
Created by: Mrs_CC