AST 220 – Introduction to Astronomy – Chapter 10 Questions and Answers
Which of these binaries would appear most similar in color telescopically? M1V and K9V
The star's color index is a quick way of determining its temperature
In general, what can be said about type O and B stars compared to type K and M stars? They
are hotter and younger
The stars with masses comparable to our Sun's, but sizes like the Earth are white dwarfs
On the H-R diagram, the bright blue stars that dominate the naked-eye sky lie at the top left
On the H-R diagram, the Sun lies at the bottom right
On the H-R diagram, white dwarfs Sirius B and Procyon B lie at the lower left
On the H-R diagram, red supergiants like Betelgeuse lie at the top right
Compared to the size of the Sun, stars of all types range from 0.01 to 1,000 solar radii
A star near the lower right of the H-R diagram is likely to be red, with low luminosity
Binary stars separated enough to be resolved in a telescope are called visual binaries
The Doppler shift is used to find spectroscopic binaries
, Which type of binary can have their sizes measured directly by photometry? eclipsing
In what range of masses are most stars found? 0.1 to 100 solar masses
What information can be gained from the light curves of eclipsing binaries? their sizes
In addition to the proper motion, we also need the ___ to find the transverse velocity of a star
across our line of sight. distance
To find the distance of nearby stars, we use their parallaxes obtained over ____-month
intervals. six
If its parallax is 1", then the distance to the star is ____ light-years. 326
Studies of a star's position made on the same calendar date over subsequent years yield ____.
...
The distance to a star with a parallax angle of 0.2 arc seconds is ____. 65.2 light-years
To find the ____ velocity, we must combine proper motion and parallax data. transverse
If a star has a parallax of .005", then its distance is ____ light years. 660 light years
The absolute magnitude scale is defined so that a difference of five magnitudes is a luminosity
difference of ____. 100 times
Which of these binaries would appear most similar in color telescopically? M1V and K9V
The star's color index is a quick way of determining its temperature
In general, what can be said about type O and B stars compared to type K and M stars? They
are hotter and younger
The stars with masses comparable to our Sun's, but sizes like the Earth are white dwarfs
On the H-R diagram, the bright blue stars that dominate the naked-eye sky lie at the top left
On the H-R diagram, the Sun lies at the bottom right
On the H-R diagram, white dwarfs Sirius B and Procyon B lie at the lower left
On the H-R diagram, red supergiants like Betelgeuse lie at the top right
Compared to the size of the Sun, stars of all types range from 0.01 to 1,000 solar radii
A star near the lower right of the H-R diagram is likely to be red, with low luminosity
Binary stars separated enough to be resolved in a telescope are called visual binaries
The Doppler shift is used to find spectroscopic binaries
, Which type of binary can have their sizes measured directly by photometry? eclipsing
In what range of masses are most stars found? 0.1 to 100 solar masses
What information can be gained from the light curves of eclipsing binaries? their sizes
In addition to the proper motion, we also need the ___ to find the transverse velocity of a star
across our line of sight. distance
To find the distance of nearby stars, we use their parallaxes obtained over ____-month
intervals. six
If its parallax is 1", then the distance to the star is ____ light-years. 326
Studies of a star's position made on the same calendar date over subsequent years yield ____.
...
The distance to a star with a parallax angle of 0.2 arc seconds is ____. 65.2 light-years
To find the ____ velocity, we must combine proper motion and parallax data. transverse
If a star has a parallax of .005", then its distance is ____ light years. 660 light years
The absolute magnitude scale is defined so that a difference of five magnitudes is a luminosity
difference of ____. 100 times
