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31 Cards in this Set
- Front
- Back
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developed the earth-centered model of the universe which was believed for thirteen centuries
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Ptolemy
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developed the sun-centered model of the universe
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Capernacus
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Galileo supported the sun-centered universe thoery by using a simple telescope to see ___ and ___
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Jupiter and moons
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what are the things that are compared on each axis of an H-R diagram? (on y-axis; x-axis)
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on y-axis: brightness
on x-axis: temperature |
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identify the three main shapes of galaxies.
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elliptical, irregular, spiral
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what shape is our galaxy?
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spiral
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sequence the color of the stars according to their temperature. list the coolest clor first.
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red (cooler)
orange yellow white blue (hotter) |
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six steps in the life cycle of a small star beginning with its birth and ending with its death.
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nebula (beginning)
protostar main sequence red giant white dwarf black dwarf (death) |
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the moon's surface is pockmarked with craters because the moon :
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has little or no atmosphere.
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Mars has a reddish-pink sky because of:
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blowing red dust makes it appear that color
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the inner planets are separated from the outer planets by:
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an asteroid belt
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A star is born when
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nuclear fusion starts in the core
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During a solar eclipse
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the moon blocks out the sun
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Kepler showed that the orbits of the planets are
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elliptical
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which of the following would affect a star's apparent brightness as viewed from Earth?
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temperature, size, and distance from Earth
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the surface temperature of a star can be estimated based on the star's
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color
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An observation of the red shift of galaxies suggest that the universe is
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contracting
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clusters of galaxies can form larger groups called
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superclusters
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The moon enters a full moon phase about once every
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month
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Which part of a telescope enlarges the image?
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eyepiece lens
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Which of the inner planets have a thick atmosphere composed of 95% carbon dioxide?
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Venus
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Most of the outer planets were studies by
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Voyager 2
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The moon of Jupiter that has active volcanoes is:
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Io
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Which part of the sun do we normally see?
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photosphere
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"shooting stars" are actually
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meteors
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Main sequence stars with the brightest absolute magnitude are generally
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blue
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If a star's mass can help to determine the star's surface temperature, then it is likely that the mass can also help to determine the star's
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color
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protostars enter the main sequence after they:
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begin nuclear fusion
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The sun and other stars produce energy because:
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hydrogen nuclei are fusing into helium nuclei in the core
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red shift indicates that:
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an object is moving away from the viewer
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a ____ telescope, only uses a convex lenses to focus light and enlarge the image.
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refracting
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