Exam 2: User's Guide to the Sky

Which of the following is a prominent constellation in the Canadian winter sky?

-The diagram shows three approximate locations of the Sun along the western horizon.Which number indicates the location of the Sun at sunset on December 21st (winter solstice)for an observer at latitude 48° North?

The planets __________ and ___________ are never visible near the eastern horizon at sunset.

What is the term for the Moon when it is visible above the western horizon a couple of hours before sunrise?

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

What is the purpose of the magnitude scale?

What is the term for a lunar eclipse in which the Moon moves completely into the Earth's umbral shadow?

The star Vega has an apparent visual magnitude of 0.03 and the star HR 4374 has an apparent visual magnitude of 4.87.It has been determined that both stars are at the same distance from the Earth.What does this information tell us about the two stars?

If you were on the Moon during a total lunar eclipse,the Sun would be hidden behind the Earth.

What is the term for the point in the Earth's orbit where the Earth is farthest from the Sun?

A third magnitude star is three times brighter than a first magnitude star.

The Moon has an angular diameter of 0.5°.What is the Moon's angular diameter in minutes of arc?

Why don't eclipses occur at every new Moon and full Moon?

The Moon and visible planets are always within a few degrees of the ecliptic.

During an annular eclipse of the Sun,the corona of the Sun is visible.

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

Which planet(s)in our solar system is (are)never visible to the naked eye?

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

_________ is the point in the Earth's orbit when the Earth is closest to the Sun.

Which of the following measures time relative to the stars?