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part 3 first midterm
lab solutions
34
Astronomy
Undergraduate 1
09/16/2010

Additional Astronomy Flashcards

 


 

Cards

Term
the sign given to you is actually in what direction of what appears?
Definition
left
Term
what is the birghtest star in the night sky?
Definition
serius
Term
stars move in wat direction
Definition
counterclockwise around north star
Term
is the sun and moon ever above the horizon at the same time?
Definition
sometimes
Term
for someone in mb the rising location along te horizon for a star that eventually will pass through the senith is
Definition
north of east
Term
how much time is there between when a star rises and when it sets?
Definition
it depends on the starw
Term
where is the location of circumpolar stars for someone in myrtle beach
Definition
northern sky and range from the horizon to high in the skky
Term
why is the name equinox appropriately used to reference the vernal and sutumnal equinoxes?
Definition
there are apprx equal number of daylight and night hours
Term
why do locations on the equator not expierence large variations in temps over the course of a year?
Definition
onger days and more concentrated light
Term
why is the north pole called the land of the midnight sun?
Definition
for any location north of the arctic circle, there is at least one day a year where the sun is above the horizon for the entire day
Term
for how ong is the sun beow the horizon for someone situated at the nort poe?
Definition
6 months
Term
why is there an arctic circle?
Definition
the arctic circle represents the furthest point from the north pole that sunlight can be reached after passing over the poles
Term
as the moon becomes more fully illuminated from one nigt to the next it is said to be
Definition
waxing
Term
will everyone on earth see the same moon phase?
Definition
yes
Term
angle of tilt
Definition
23.5
Term
solstices
Definition
when earths axis points exaclty toawrd the sun
Term
diurnal changes
Definition
earths rapid rotation changes the nightly view of the stars
Term
waxing crescent horns
Definition
central african societies could predict the wet seasons
Term
what does the local celstrial meridian pass through
Definition
north point, zenith and the south point
Term
sidereal day
Definition
time it takes the sun to return to the same position relative to the background stars
Term
how long does it take the moon to orbit the earth?
Definition
27.3 days
Term
how long does it take for a moon to go through all the phases
Definition
29.5 days
Term
sidereal year
Definition
time it takes earth to trave 360 degs around the sun
Term
"side real"
Definition
relative to the stars
Term
eiquinoxes angle
Definition
perpidicular to the sun
Term
lunar month
Definition
time interbal between successive new moon phases
Term
sidereal month
Definition
time to travel 360 abt earth
Term
ancient lunar calenders used months of
Definition
29 and 30 days
Term
a year based on unar months would fall
Definition
short about 11 days
Term
4200 egyptians used how many day calender
Definition
365
Term
julian calender
Definition
introduced an extra day to the year once every 4 years
Term
modern time system is based on what?
Definition
solar days and uses a gregorian calender which attempts to reproduce a tropical year
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