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42 Cards in this Set
- Front
- Back
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is Pluto a planet? why or why not
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no
smaller than moon thousands of Pluto sized objects in space |
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parallax
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how much an object appears to move when viewed from two different locations
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light year
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distance light can travel in one year, 9.46 x 10^12 km
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waxing
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first half of phases, light on right side
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waning
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second half of phases, light on left side
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crescent moon
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crescent shaped moon
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gibbous moon
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most of moon is lit
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quarter moon
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half of moon is lit
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solar eclipse
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when earth is in moon's shadow
blocking view of sun |
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lunar eclipse
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moon is in earth's shadow
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geocentric
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earth centered view of planetary system
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heliocentric
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sun centered view of our planetary system
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parallax
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how much an object appears to move when viewed from tow different locations
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period
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amount of time an object takes to orbit
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eccentricity
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describes shape of an orbit
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how long does it take for moon to orbit earth
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29.5 days
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how long is a moon phase
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3.7 days
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how many phases of the moon
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8
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viewed from north pole, what direction does moon revolve around earth
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counter-clockwise
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order of moon phases
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new, waxing crescent, 1st qtr., waxing gibbous, full, waning gibbous, 3rd qtr., waning crescent
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doppler effect for moving toward us
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higher pitch and frequency, shorter wave length
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doppler effect for moving away from us
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lower pitch and frequency, longer wave length
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stars with high temperatures tend to be more...
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luminous
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blue stars=
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hot and luminous
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red stars=
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cool and dim
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white dwarfs
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small, hot, dim
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supergiants, giants
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large, luminous, cool
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classifying stars
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assigned letter types, O(HOT) B A F G K M(COOL), O6 is less than B2
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life of big star
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nebula, larger into high-mass star, short main sequence, supergiant, large explosion into supernova, bigger into black hole, smaller into neutron star
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life of smaller star
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nebula, medium-mass star, longer main sequence, red giant, white dwarf with less isn't an explosion
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nebula
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large cloud of dust or gas, gravity causes material to condense into stars
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main sequence star
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mass of a star determines path
larger stars-shorter lives(burns fast, dies young) smaller stars-longer lives start off as one of colors on graph |
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to locate a star you need (x,y) and z, what does z mean?
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distance to the star
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au(distance from earth-sun) vs period(earth days)
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more earth days the farther form the sun
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AU vs density
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lower in farther planets
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AU vs temperature
closer to farther planets |
temperature drops
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AU vs Eccentricity
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rises a lot
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how many centers of the universe?
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indefinite, many
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doppler effect
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when the pitch of a siren is higher as it moves towards you and lower as it passes by and leaves
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spiral galaxy
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has arms coming out of sides in a spiral fashion
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elliptical galaxy
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cigar-shaped, circle, long, narrow
smooth with bright center softening to outside |
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irregular galaxy
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little symmetry in structure, can't be classified as elliptical or spiral
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