Exam 2: A Users Guide to the Sky

In 1928, the International Astronomical Union (IAU) established _______________ official constellations with carefully defined boundaries that together include every part of the sky.

Which planet is often called our most brilliant "morning star"?

Why is the term  "arc" used to describe units of measure for angular distance?

What is the name of constellations that appear to never rise or set?

The Sky Around You - Page 19 In the above image, what is the observer measuring?

Most individual star names come from Latin and have been altered through passing centuries.

Explain why we have seasons and compare/contrast the cycle of seasons for both hemispheres.

Earth's rapid rotation makes its axis sweep out the shape of a cone, like a heavy top slowing down.  This motion is known as ____.

What did the IAU establish in 1928?

What is the Milankovitch hypothesis and what evidence is there to support this hypothesis?

If star A is 14.5 times brighter than star B, then what is their magnitude difference?

Astronomers describe the brightness of stars using the brilliance scale.

The seasons are caused by Earth's orbit moving closer to or farther from the Sun.

Earth's rotation is connected with a very slow celestial motion that can be detected only over _____

Flux is a measure of the light energy from a star that hits a collecting area of one square meter in one second.

When can Sirius, a favorite star of the Northern Hemisphere, be observed?

Because Earth's axis of rotation is inclined 23.4 degrees from vertical, the Sun moves into the northern sky in the spring and into the southern sky in the fall.

What was the purpose of the IAU establishing 88 official constellations?

Even though modern astronomers know that stars are scattered through space at different distances, they still use what scientific model to describe celestial locations in the sky?

Astrology is an example of _______________.