Exam 2: A Users Guide to the Sky

If you are at the South Pole and are standing straight then your head points up to nadir and your feet point down to zenith.

A sketch of the Earth with its north and south poles and equator is shown. The zenith is located in the sky over your head if you are at ​

An observer on Earth's geographic north pole would find

A(n) ____ is 1/60th of a minute of arc.

A second magnitude star in Ursa Major is brighter than a fourth magnitude star in Orion.

Which of the following is an example of a scientific model?

If an observer walks north toward increasing latitude, the number of circumpolar stars would

The apparent visual magnitude of a star is a measure of the star's

As Earth rotates, circumpolar stars appear to move counterclockwise around the north celestial pole.

Which of the following is false?

The full Moon is brighter than Venus regardless of how bright Venus is in the sky on any night as viewed from Earth.

Hipparchus devised the magnitude system in the late 1700's.

The ____ of an object can be measured in degrees.

In contrast to Ursa Major, the Big Dipper is not a(n) ___ but is instead a(n) ______

Star A has an apparent visual magnitude of 6.3 and star B has an apparent visual magnitude of 5.3. Star A is _________ times (fainter or brighter) than star B.

If you are standing at the Earth's north pole, which of the following would be located at the zenith?

You live at a latitude of 28° N. What is the angle between the northern horizon and the north celestial pole?

On a clear night you go outside and face south and see circumpolar stars. Then you turn and face north and you see stars rising in the east and setting in the west. Where are you located on Earth?

In which direction is Earth precessing? Choose the best answer.

In the designation α Canis Majoris, which part refers to the star and which part refers to the constellation?