Exam 2: User's Guide to the Sky

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

What do stars in the same constellation have in common?

A total lunar eclipse is visible only from the path of totality.

When and where is a waxing crescent Moon visible?

The celestial equator always passes directly overhead.

The celestial equator always crosses the horizon at the east point and west point.

The path of totality for a solar eclipse is swept out by the tip of the Moon's umbra as the umbra moves over the Earth.

If you were standing on the Earth's equator,which of the following in the sky would pass through your zenith during the entire day (24 hours)?

Where is a total lunar eclipse visible?

During the month of June the north celestial pole points towards Polaris;where does it point during the month of December?

In Brazil,in what month does the longest period of daylight occur?

What is the ecliptic?

What is the term for the point on the celestial sphere directly above an observer,no matter where on the Earth the observer is located?

What is apparent solar time?

For an observer at the North Pole,what is the angular distance between a star at declination of +30° and the zenith?

-The diagram shows three approximate locations of the Sun along the western horizon.Which number indicates the location of the Sun at sunset on June 21 (summer solstice)for an observer at a latitude of 77° North?

What determines the phase of the Moon on a particular night?

At which of the following times would you find the Sun on the celestial equator?

Which of the following best defines the ecliptic?

What is the term for a set of beliefs that appears to be based on scientific ideas,but which fails to obey the most basic rules of science?