Astronomy Chapters 1-6

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Asterism
traditional name given to a group of stars (ie-big dipper)
celestial horizon
boundary line of the earth
zenith
directly above you wherever you are, 90 degrees upwards
angular size
angle taken up by object, relevant to related size and distance away from us
polaris
the north star
prime meridian
Greenwich, England
latitude of montgomery
about 32 degrees
right ascension
longitude
declination
latitude or the angle from celestial equator
hour circles
meridians marked with time units
hour equinox
prime meridian
celestial meridian
a curve that starts north to Pole to zenith to southern point
sidereal day
day measured by the stars
seasons
the suns apparent motion through the stars created by the orbital motion of the earth
meaning of equinox
equal nights
cause of seasons
1. annual variations of daylight 2. concentration of sunlight
solar time
time according to the sun
mean solar time
average rate of the sun
AM
anti-meridian hours
PM
post-meridian hours
waxing moon
moon that is getting brighter
waning moon
moon that is getting darker
how many degrees is an hour?
15
amount of time difference between sun and star movement?
4 mins
Categories: Astronomy