Exam 2: A Users Guide to the Sky

Which is an example of an asterism?

The scale of apparent visual magnitudes extends into negative numbers to represent the faintest objects in the sky.

Arc seconds are _______________th of an arc minute.

Within the Northern Hemisphere, the vernal equinox marks the start of ____.

The International Astronomical Union established 88 constellations that represent a defined area of the sky.

In ancient times, constellation boundaries were well defined.

Explain why it is difficult to see Mercury in the night sky.

On the day of the _______________ in late June, Earth's Northern Hemisphere is inclined toward  the Sun.