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32 Cards in this Set
- Front
- Back
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solar eclipse
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when the moon passes between the sun and the earth and the moon covers the sun (as seen from earth)
***only during a new moon |
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lunar eclipse
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when the moon passes behind earth so earth blocks the moon from sun rays
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we live in ...
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milkyway galaxy
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white dwarf
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a type of dead star
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space between the stars is called
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interstellar medium
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redwarf
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most common star in the galaxy
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giant planets (4)
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saturn, jupiter, uranus, neptune
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1 AU
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the distance from the earth to the sun
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why does a circle have 360 degrees?
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bc of babylonians estimate that a year was 360 days
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planets
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"wanderers"
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ecliptic
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path of sun through stars
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zenith
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highest point reached by a celestial body during its orbit during an observation
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nadir
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at a given point is the local vertical direction pointing in the direction of the force of gravity at that location
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solar day
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24 hrs
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sideral day
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23 hr and 56 minutes
4 minute difference |
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heliacal risings
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the first day a star can be seen before sun rise
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the zodiac
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planets move, but only by 18 degrees from the ecliptic
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the dawn of science
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facts about nature
could be learned by systematically observing and experimenting |
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Moon is spherical because its terminator is round
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Aristotle
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Sun is farther away than Moon demonstrated by
Moon’s phases |
aristotle
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Earth is spherical because of shape of Earth’s shadow
in eclipses |
A
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gives physically wrong model for solar
system and stars |
pyolemy
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the great observer
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Tycho Brahe
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circular motion of planets around the sun
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copernicus
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mathematical description of
Tycho’s observations confirming sun at center of solar system |
kepler
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telescope maker
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Galileo
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formulated laws of
mechanics and gravity, explained elliptical planetary orbits |
newton
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planets farther from the sun move more .....
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slowly
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keplers 1st law
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orbits are ellipses w/ sun at center
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line between planet and sun sweeps out equal areas at equal times
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keplers 2nd law
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terrestrial planet
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solid and rocky
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giant planets
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gaseous, inner rocky core
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