The north celestial pole is easily located by the star __________ in Ursa Minor.
Polaris
Pollux
The __________ coordinate system uses the observer's local horizon as the fundamental plane.
Horizontal
Vertical
Which angle describes the object's position above the horizon in the horizontal coordinate system?
Altitude
Azimuth
The horizontal coordinate system provides information about altitude and azimuth.
True
False
An object with an altitude of 90° is directly below the observer and is called nadir.
True
False
The azimuth is the angle between an object and true south in the horizontal coordinate system.
True
False
Why do the Sun, Moon, planets, and stars appear to rise in the East and set in the West?
Earth’s rotation
Earth’s magnetic field
What direction does Earth rotate on its axis?
East
West
Stars close to the celestial poles are known as __________ stars.
Circumpolar
Circular
Horizontal
Stars near the celestial poles are circumpolar, never setting below the horizon.
False
True
What is the celestial coordinate system that uses altitude and azimuth called?
Horizontal system
Galactic system
How many constellations are there in total?
88
78
The Earth's equator extended into space divides the celestial sphere.
False
True
What marks the north celestial pole?
Polaris
Betelguese
What is the celestial sphere divided into?
Northern and Southern hemispheres
East and West
The point straight above you in the sky is called __________.
Zenith
Nadir
In which direction do stars appear to move across the night sky near the celestial poles?
North to South
East to West