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in 1610 when galileo first pointed a telescope at the sky he discovered _____'s four large moons
this planet radiated more heat than it absorbs because of the friction of helium rain drops falling
______'s magnetic field is produced in its rapidly spinning mantle of liquid metallic hydrogen
while _____'s rotation axis is only tilted at 29 degrees, its magnetic fields are just as strange as its twins'
in the telescope, ______ shows the most turbulent atmosphere with changes easily seen even with amateur telescopes
the planet _____ has the least variation in temperatures on the surface between day and night due to its carbon dioxide atmosphere
at the poles of ______, there are 42 earth years of constant daylight, then the same length of time of constant darkness
what is the source of jupiter's excess energy
the slow escape of gravitational energy which heated the planet's interior
what is the predition for the future of triton
it will get below roche limit and and break up then turn into a ring
the asteroid belt is believed to be debris left over from the age of formation of the solar system; the tidal effects of _____ probably prevented formation of a major planet there
small icy bodies in the solar system which travel about the sun in highly eccentric orbits and come from all directions are
discovered in the 1990s, the _____ is a vaster, darker version of the more famed asteroid belt between Mars and Jupiter
few _____ actually strike the earth, because most are small and burn up in the atmosphere
what is the defining property of the trojan asteroids
in jupiter's orbit, 60 degrees ahead/behind it
the k-t boundary event happened about 65 million years ago when an asteroid the size of deimos struck the ____ peninsula
meteorites are valuavke to astronomers because
they may provide evidence about the process in which the solar system was born
which statements about the magnetic fields of uranus and neptune is false
both pass directly through the cores of their planets, like all other fields
the rotation period of uranus was measured through
observations of radio signals associated with its magnetosphere
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