Hw8 – Space – Flashcards
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Comets
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Visible in the sky as a fuzzy patch of light that rises and sets with the stars, form a coma when near the sun, most are located either in the Kuiper Belt or Oort cloud.
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Meteors
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Visible in the night sky as a bright streak of light for only a few seconds and dust particles entering Earth's atmosphere at high speed.
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Asteroids
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Compositions similar to that of the terrestrial plantes and typically orbit the sun at approximately 3 A.U.
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A comet entering the inner solar system from afar will
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Form a coma and sometime later form a tail.
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During the time that a comet passes through the inner solar system the comet can appear quite bright because
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Sunlight reflect off the comets tail and coma
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A comets plasma tail always points directly away from the sun because
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Of pressure exerted by fast moving charged particles in the solar wind.
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About a trillion comets are thought to be located far far beyond Pluto in the
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Oort cloud
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The bright spherical part of a comet observed when it is close to the sun is
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Coma
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A comets______ stretches directly away from the sun.
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Plasma tail
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A comet's____ is the frozen portion of a comet.
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Nucleus
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Particles ejected from comet can cause a_____on earth
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Meteor shower
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The___ extends from about behind the orbit of the Neptune to about time the distance of Neptune from the sun
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Kuiper Belt
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Barringer Crater in Arizona is an example of a meteorite impact.
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True
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What are most meteorites made if?
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Mostly rock.
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What is the source of the material of a meteor shower?
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Comets.
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Meteor showed are the result of collisions between asteroids.
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False
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The largest asteroid and probably the only one to be spherical world is.
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Ceres
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The Kuiper Belt is found where in the solar system?
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Beyond the orbit of Neptune.
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Which statement about asteroids is not true?
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Their images become blurry due to out gassing as the sun heats them up.
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Meteorites are important because
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Some come from the moon and Mars, as well as the asteroid belt, large ones may cause mass extinctions, they contain pristine material from the solar nebula
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The nucleus of a comet is typically
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A few kilometers in size and very low in density.
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Objects in the Kuiper Belt
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Lie beyond the orbit of Neptune and close to the ecliptic.
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The orbits of most comets
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Lie almost entirely behind the orbit of Neptune.
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Long period comets are believed to originally come from
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The Oort cloud
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A meteorite
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A chunk of space debris that has struck the ground.
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Which of the following statements is most accurate when comparing the inner and outer solar system?
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The inner solar system is under presented in light elements.
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Which si dust important to condensation sequence?
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Without dust there would be nothing for the solar nebula gas to condense onto.
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I'm light of modern solar system theory why do orbits of the planets all lie eat the same plane?
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The early splat nebula flattened into a disk.
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Which of the following is not a property of our solar system we must account for in a theory of its origin?
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The early is the only Plante that is know to have life.
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As a rotating gas cloud contracts it spins faster.
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True
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I'm the solar nebular theory the dusty disk condensing around the sun's equator became the ecliptic plane in which the Planets then formed.
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True
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In addition to revolving around the sun counter clockwise most Plante also rotate on the axis counter clockwise.
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True
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Any successful model for the formation of the solar system must explain why the orbits of the planets have low eccentricities.
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True
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As the solar nebula contracts it
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Spins faster due to conservation of angular momentum
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According to the solar bening theory Planets
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Should be a common result to star formation
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As a rotating gas cloud contracts it spins
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Faster due to conservation of angular momentum
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A few of the characteristics that a model of solar system formation must explain are illustrated in the figure Below choose the ones apply to this figure
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Planet are comparatively isolated on space, a collection of asteroid sized objects arbors beyond Neptune in the Kuiper Belt, Planets orbit with nearly circulation orbits.
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...
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Mostly the direction of the planetary rotation is the same as the direction of the sun's rotation. Most satellite orbital direction is the same as the satellites parent rotational direction. Planets orbit in the same direction as the sun rotates on its axis.
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Terrestrial planets
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Accreted from plantetesimals of rock a D metal and surfaces dramatically altered during the heavy bombardment.
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Jovian Planets
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Accreted from icy plantetesimals, formed in regions cold enough for water to freeze, ejected icy plantetesimals that a are not Oort cloud comments, large moon's formed in surrounding disk materials, formed in a region of the solar system with lower orbital speeds.
