Modern Astronomy Review

Front

What is the relationship between temperature and luminosity of main sequence stars?

Back

As temperature increases, luminosity increases.

Front

What causes day and night on Earth?

Back

The rotation of Earth on its axis.

Front

During the Fall Equinox, how long do days and nights last?

Back

12 hours.

Front

Is Galaxy A moving towards, away, or stationary relative to us?

Back

Away.

Front

What can be said about the areas between points A, B and H, I relative to the Sun?

Back

Both areas are equal in size.

Front

Define 'main sequence star'.

Back

A star that is in the stable phase of hydrogen burning in its core.

Front

What is the significance of the Fall Equinox?

Back

It marks the point in the year when day and night are approximately equal in length.

Front

What is rotation in the context of Earth?

Back

The spinning of Earth on its axis, which causes day and night.

Front

What is luminosity?

Back

The total amount of energy emitted by a star per unit time.

Front

What is the difference between rotation and revolution?

Back

Rotation is the spinning of an object on its axis; revolution is the orbiting of one object around another.