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What is a circumpolar star?

a star that always remains above your horizon

What makes the North Star, Polaris, special?

It appears very near the north celestial pole

You are standing on Earth's equator. Which way is Polaris, the North star?

on the northern horizon

By locating the north celestial pole (NCP) in the sky, how can you determine your latitude?

The altitude of the NCP is the same as your latitude.

the celestial equator is

a pojection of earths equator into space

horizons altitude =

0 degrees

zenith is at

90 degrees altitude

angualr sizes with a fist =

10 degrees

angular size with fingers spread apart is

20 degess

one finger =

1 degrees

earth rotatesd from

west to east and makes the celestial sphere appear to rotate around us from east to west

stars that circle or only loop above the horizon are


some stars only make a loop under the horizon and are


other stars rise in the

east and set in the west

the horizon slices through the celestial sphere at an angle tot the equator

causing the daily circles of sdtars to appear tilted in the local sky

the local sky at sydney austraila is

34 degrees latitudde

the local sky at the north pole is

90 degreees latitude

celestial sphere at the north pole

would only see half the celestial sphere, no star rises or sets, they are all circumpolar

celestial sphere at earths equator

all stars rise and set, the celestial spheres are on the northern and southern horizon, would see all of the celestial sphere over the course of a day

celestial sphere somewhere between P and E

some stars are circimpolar, some rise in east and set, and some never rise, one celestial pole is above te horizon, the altitude of the celestial pole is equal to the latitude of your location

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