Exam 2: A Users Guide to the Sky

In the picture shown, which label is the asterism, constellation, and star?

The ____________________ is the point on the celestial sphere directly above an observer, regardless of where the observer is located on Earth.

Earth's rotation axis is approaching Polaris today.

If you point toward the zenith right now and then point there again 6 hours later, you will have pointed twice in the same direction relative to

You live at a latitude of 16° S. What is the angle between the southern horizon and the south celestial pole?

The celestial equator is

The apparent visual magnitude difference between two stars is 10 and thus the approximate intensity ratio is 10,000.

Star A has an apparent visual magnitude of 13.4 and star B has an apparent visual magnitude of 15.4. Star A is ____ than star B.

An observer in the Southern Hemisphere takes a time exposure photograph of the night sky. If the illustration below depicts the photograph taken by the observer, which direction was the camera pointing?

An observer in the Southern Hemisphere takes a time exposure photograph of the night sky. If the illustration below depicts the photograph taken by the observer, which direction was the camera pointing?

An observer in the Southern Hemisphere takes a time exposure photograph of the night sky. If the illustration below depicts the photograph taken by the observer, which direction was the camera pointing?

During the month of June the north celestial pole points towards Polaris, but during the month of December it points

What advantage is there in referring to a star by its Greek-letter designation and constellation name rather using its traditional name?

The magnitude scale

As seen from the Earth's southern hemisphere, the celestial equator passes

Navigators can find their latitude in the northern hemisphere by measuring the angle from the northern horizon to the north celestial pole.

You live at a latitude of 39° S. What is the angle between the southern horizon and the south celestial pole?

Seen from the northern latitudes, the star Polaris

You live at a latitude of 39° S. What is the angle between the southern horizon and the south celestial pole?

What is the approximate latitude of the observer in the diagram below if they are located in the hemisphere containing the north celestial pole? ​ ​