Exam 2: Patterns in the Skymotions of Earth

For an observer in the Northern Hemisphere,as he or she looks north,stars travel in a clockwise direction around the north celestial pole over the course of the night.

How far away on average is the Earth from the Sun?

The Earth's rotational axis precesses in space and completes one revolution every:

When the Northern Hemisphere experiences summer,the Southern Hemisphere experiences:

What time does a third-quarter Moon rise?

A person who lives at the equator will see the Sun directly overhead at noon every day of the year.

How often would we have leap years if Earth's orbital period were 365.1 days?

How does today's Gregorian calendar differ from the calendars of more ancient civilizations,such as the Chinese,the Egyptians,and the Babylonians?

Draw a dome representing the visible sky.Label the horizon,meridian,zenith,and each of the four cardinal directions (north,east,south,and west).

What defines the location of the equator on Earth?

If you are standing on the equator and shoot a cannonball directly north,where would you expect it to land?

Consider an observer located on the equator.If the observer sees a star directly overhead at 10 P.m. ,where will that star be located in the night sky at 3 A.M.?

On what place(s)on Earth can you stand and have the celestial equator be at the same altitude for all 360° of its circumference?

No matter where you are on Earth,stars appear to rotate about a point called the:

At which of the possible times below could the waxing gibbous moon be seen rising?

The altitude of the Sun as it crosses the meridian changes during the year.

Based on the location of the moon in the diagram below,draw a picture of how the moon would appear to an observer located on Earth.

The meridian is half of an imaginary circle in the sky that passes through an observer's zenith and both celestial poles.

We experience seasons because:

At what latitude is the north celestial pole located at your zenith?