| Terms |
Definitions |
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supergiants
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Very Large stars
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Inned Planets
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Mercur,Venus, Earth, Mars
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Geocentric
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"Earth-centered." Refers to the ancient notion that earth is the center of the universe.
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anything that orbits another larger object in space
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Conjunction Diagram on the Opposite Side of this Card
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...
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Moon
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Natural satellite that orbits a planet.
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Meteorite
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A meteoroid that lands on Earth.
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Chromosphere
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The level of the sun's atmosphere between the photosphere and the corona.
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meteor shower
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Occurs when Earth intersects a cometary orbit and come particles burn up as they enter Earth's upper atmosphere
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Classifying Stars
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the main characteristics used to classify stars are size, temperature, and brightness.
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Orbit
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Movement of the earth around the sun
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Galaxy cluster
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system of galaxies containing from several to thousands of member galaxies.
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Isaac Newton
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Defined the laws of motion and gravity; was trying to explain the motion of the universe
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Gravity
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Force that keeps each planet in its path around the sun
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Heliopause
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The point at which the solar wind meets the interstellar medium or solar wind from other stars.
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Photosphere
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Bright yellow surface of the sun; Thin layer. Most light we receive comes from this layer.
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Meteor
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Light made by meteoroid as it passes through Earth's atmosphere.
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comet
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dust, frozen, water and gas with a tail
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geocentric model
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Earth is the center of the universe
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Meteorites
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fragments of rock from space the land on Earth.
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uranus
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planet tilts over so far on its axis that it rotates on its side
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nebular theory
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states that the solar system began as a huge cloud of dust and gas which later condensed to form the sun and its nine planets
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Solar Activity Cycle
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Also called the sunspot cycle. An 11-year cycle during which the number of sunspots rises to a maximum or falls to a minimum.
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Annular Eclipse
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occurs when the Sun and Moon are exactly in line
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Atmosphere of Jupiter
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composed of hydrogen and helium with some ammonia, methane and water vapor
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Solar System
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made up of the 9 planets numerous other objects that orbit the Sun.
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astronomical unit
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or AU, is equal to the average distance between Earth and the sun.
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Solar Nebula
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The cloud of gas and dust that began to collapse about 5 billion years ago to form the solar system.
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Uranus (outer planet)
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is the seventh planet from the sun discoverd in 1781 and has at least 27 moons
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Sublime or Sublimate
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To change directly from a solid to a gas without becoming a liquid.
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