Honors science final {astronomy} questions – Flashcards
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A group of stars, gas, and dust held together by gravity is a ___________.
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galaxy
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All are examples of an NEO except:
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moon
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Which is the actual or true brightness of a star?
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luminosity
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Which is how bright the star appears to an observer on Earth?
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apparent magnitude
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Hazards associated with an NEO include all except:
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Volcanoes
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Which planet is very hot because of the greenhouse effect and has sulfuric acid in its clouds?
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Venus
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A ___ is an object so dense that nothing including light can escape its gravity field
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black hole
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The distance that light travels in one year is
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9.5 x 10^12
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What happens to spectral lines from a star when the distance between the star and Earth is increasing?
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they shift toward the red end of the visible spectrum.
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Which is the term to express luminosity of stars if they were seen from the same distance?
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absolute magnitude
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Which planet is not considered terrestrial?
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saturn
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Which is an example of constellation?
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orion
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A planet at aphelion is?
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farthest away from the focus of the orbit
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A planet at perihelion is?
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at the point its orbit nearest to the sun
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Which is NOT an example of circumpolar constellations for the Northern Hemisphere?
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Orion
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The speed of light is..
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300,000 km/sec
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Which stage follows the stable state for most stars?
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giant
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Which characteristics are true of both planets and asteroids?
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They are present in the solar system.
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The positions of the constellations appear to change throughout the year because__________
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Earth revolves around the sun
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The big bang theory of the formation and expansion of the universe is supported by the observed
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Doppler shift to red
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About 90 percent of the stars in space are _________ stars.
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main sequence
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Which of these lists of cosmic features is in the correct order of size, beginning with the largest?
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Universe, galaxy, star, planet
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When small pieces of rock moving through space enter Earth's atmosphere and burn up, they are called _____
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meteors
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A comet develops a coma because of ____
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heat from the sun
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Which planet is not considered Jovian?
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pluto
