Astronomy Chapter 17

What is the absolute magnitude of our Sun?

The absolute magnitude of a star is its brightness as seen from a distance of:

In comparing first magnitude Deneb with second magnitude Polaris, we find that:

At the distance of Jupiter (6 times further away from the Sun than Earth) the amount of sunlight received per square centimeter different by what factor?

Star A and star B both have an apparent magnitude of 4.0, but star A has an absolute magnitude of 1.0 and star B has an absolute magnitude of 7.0. Which statement below is correct? Select one: A. Star A appears brighter than star B, but actually star B and star A are the same brightness. B. Star B appears brighter than star A, but actually star B and star A are the same brightness. C. Star A and star B appear to have the same brightness, but actually star B is brighter than star A. D. Star A and star B appear to have the same brightness, but actually star A is brighter than star B. E. It is impossible to determine how bright these stars are or appear to be relative to one another, given the information above.

Star A and Star B both have an apparent magnitude of 7.0, but Star A is at a distance of 15 pc and Star B is at a distance of 30 pc. Which statement below is correct?

Star A and Star B both have an absolute magnitude of 2.0, but Star A is at a distance of 50 pc and Star B is at a distance of 20 pc. Which statement below is correct?

Star A and Star B both have an absolute magnitude of 2.0, but Star A has an apparent magnitude of 5.0 and Star B has an apparent magnitude of 7.0. Which statement below is correct?

Star A has an absolute magnitude of 2.5 and Star B has an apparent magnitude of 2.5, but Star A is a main sequence star and Star B is a red giant. Which statement below is correct?

What are the two most important intrinsic properties used to classify stars?

The most famous G type star is:

Star A is a main sequence star of spectral type F2 and Star B is a white dwarf of spectral type B4. Which statement below is correct?

Star A is a main sequence star of spectral type G5 and Star B is a red giant of spectral type K2. Which statement below is correct?

Stars that have masses similar to the Sun's, and sizes similar to the Earth are:

On the H-R diagram, the Sun lies:

Which of the following is the most common type of star?

The Hertzsprung-Russell Diagram plots ________ against the spectral type or temperature.

How might the most common occurring stars be described, based on our stellar neighborhood?

On the H-R diagram, red supergiants like Betelguese lie:

On the H-R diagram, white dwarfs lie Sirius B and Procyon B lie:

In the H-R diagram, the bright blue-white stars that dominate the naked eye sky lie to the:

In what range of masses are most stars found?

What is the single most important characteristic in determining the course of a star's evolution?

Which of the following best describes the size and distance relationship of our Sun and the nearest star?

What is the typical main sequence lifetime of an M-type star?

What is the typical main sequence lifetime of a G-type star?

What is the typical main sequence lifetime of a B-type star?

For a star of 10 solar masses, its main sequence life span will be: