Exam 2: A Users Guide to the Sky

Seen from the northern latitudes, the star Polaris

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

In which direction is Earth precessing Choose the best answer.

Earth's rotation axis traces out a cone shape in the sky, precessing in the ___________________ direction.

How much of the Earth's surface is experiencing night at any time

The sky is flat, like a sheet of paper, and hence angular diameter is the distance measured along that flat sheet of paper.

The little dipper is an asterism that can be seen in spring from the northern hemisphere.

How are the celestial poles and celestial equator defined by Earth's rotation

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

You stand at attention with your arm overhead and finger pointing to the sky for 12 hours. During this entire time, your finger traces along the celestial equator in the sky. Where are you located on Earth

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

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

North, south, east, and west are points on the _____________ of your local sky.

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

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

If the north celestial pole appears on your horizon, what is your latitude

An observer in the Northern 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

The ____ is the point on the celestial sphere directly above an observer who can be at any point on the Earth.

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

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