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the scientific study of the universe; It includes the observation and interpretation of celestial bodies and phenomena
an eclipse of the sun; a solar eclipse occurs when the moon moves in a line directly between Earth and the sun, casting a shadow on earth
a small rocky body, which can range in size from a few hundred kilometers to less the one kilometer. They are mostly between Mars and Jupiter.
A small body made up of rocky and metallic pieces held together by froze glass. they normally revolve around the sun in an elongated orbit.
A thin gray layer on the moon's surface, consisting of loosely compacted fragmented material believed to have been formed by many meteorites hitting it.
man: had made very precise measurements and observations about solar system than any others
Kepler law #3
T²=D³ (the time of a planets orbital period ² is proportional to the average distance³
Sir Isaac Newton
every body in universe attracts to other bodies with a force that is directly proportional to their mass and inversely proportional to the ² of the distance between centers of mass
phases of the moon
new, waxing crescent, first quarter, waxing gibbous, full, waning gibbous, third quarter, waning crescent
Giant Impact Theory
a mars size meteoroid hit Earth and outside layer became moon (theory of how moon formed that is most accepted by people)
some smooth terrain(resembling maria) - very dense (large iron core) - nighttime temp. = -173 degrees Celsius - noontime temp. = 427 degrees Celsius - greatest surface temperature extremes of any planet
originates by interplanetary that was not gravitationally swept up by the planets during the formation of the solar system
density, chemical makeup, rate of rotation
3 other differences between terrestrial and Jovian planets
fourth planet from the Sun; has polar ice caps, a thin atmosphere, and a reddish appearance caused by iron oxide in weathered rocks and soil
4th planet from the Sun. Is sometimes called the Red Planet. It makes one complete orbit around the Sun every 686.98 days. Rotates on its axis about the same speed as the Earth. It completes one rotation in about 24 hours and 37 minutes. Has seasons similar to our planet, but they last much longer. Has a total of 2 satellites (or moons).Has thin atmosphere, very cold, with polar ice caps. Has the largest volcano in the solar system. Olympus Mons. No active inner core
Saturn's moon that exhibits retrograde motion; it is likely that it planetesimals or meteoroid or asteroid that was picked up
considered to be the ninth planet from the Sun; has a solid icy-rock surface and a single moon, Charon
a region of the solar system that is just beyond the orbit of Neptune and that contains small bodies made mostly of ice
(astronomy) a hypothetical huge collection of comets orbiting the sun far beyond the orbit of Pluto, A spherical region of comets that surrounds the solar system out to more than 1,000 times the distance from the sun
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