At our current location, you observe a star rising due east. When this star reaches its
highest position above the horizon, where will it be?
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High in the southern sky
If you are located in the continental U.S. on the first day of October, how will the
position of the Sun at noon be different two weeks later?
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It will have moved to a position closer to the horizon.
,A stellar day is 4 minutes shorter than a solar day. Does the Sun or Stars appear to
move faster across the sky?
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The Stars.
The dashed, curved star paths are behind the page and the solid, curved star paths
are in front of the page. Note that the position of Star B at 3 pm is labeled in the
figure to the left, which shows the part of the sky seen by the observer shown in the
figure to the right
What direction is the observer facing according to either figure ?
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Toward the north.
Thanks to the inverse-square law, how much dimmer would a star be if you moved it
twice as far away?
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1/4 as bright.
,Which of the following is the type of spectrum we observe from the Sun?
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Dark line absorption spectrum
What kind of spectrum is given off by a red colored, neon "OPEN" sign?
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An emission spectrum with more bright emission lines at the red end of the
spectrum
Circumpolar stars are stars
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that never set below the horizon.
Which of the following will collect the most light?
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A reflecting telescope with a radius of 2 m operated for 5 seconds.
, The dashed, curved star paths are behind the page and the solid, curved star paths
are in front of the page. Note that the position of Star B at 3 pm is labeled in the
figure to the left, which shows the part of the sky seen by the observer shown in the
figure to the right
Which of the stars will set on the western horizon?
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Only Star A
Star A appears to be brighter in our sky than Star B, but Star A actually gives off less
light than Star B. The apparent magnitude and absolute magnitudes for Star A are m =
0 and M = 1, respectively. Use this information to answer the following three questions.
Which is the most correct statement about the distance of Star A from Earth?
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Star A is closer than 10 pc from Earth.
Which, if any, of the objects is the same size as object D?
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highest position above the horizon, where will it be?
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High in the southern sky
If you are located in the continental U.S. on the first day of October, how will the
position of the Sun at noon be different two weeks later?
Give this one a try later!
It will have moved to a position closer to the horizon.
,A stellar day is 4 minutes shorter than a solar day. Does the Sun or Stars appear to
move faster across the sky?
Give this one a try later!
The Stars.
The dashed, curved star paths are behind the page and the solid, curved star paths
are in front of the page. Note that the position of Star B at 3 pm is labeled in the
figure to the left, which shows the part of the sky seen by the observer shown in the
figure to the right
What direction is the observer facing according to either figure ?
Give this one a try later!
Toward the north.
Thanks to the inverse-square law, how much dimmer would a star be if you moved it
twice as far away?
Give this one a try later!
1/4 as bright.
,Which of the following is the type of spectrum we observe from the Sun?
Give this one a try later!
Dark line absorption spectrum
What kind of spectrum is given off by a red colored, neon "OPEN" sign?
Give this one a try later!
An emission spectrum with more bright emission lines at the red end of the
spectrum
Circumpolar stars are stars
Give this one a try later!
that never set below the horizon.
Which of the following will collect the most light?
Give this one a try later!
A reflecting telescope with a radius of 2 m operated for 5 seconds.
, The dashed, curved star paths are behind the page and the solid, curved star paths
are in front of the page. Note that the position of Star B at 3 pm is labeled in the
figure to the left, which shows the part of the sky seen by the observer shown in the
figure to the right
Which of the stars will set on the western horizon?
Give this one a try later!
Only Star A
Star A appears to be brighter in our sky than Star B, but Star A actually gives off less
light than Star B. The apparent magnitude and absolute magnitudes for Star A are m =
0 and M = 1, respectively. Use this information to answer the following three questions.
Which is the most correct statement about the distance of Star A from Earth?
Give this one a try later!
Star A is closer than 10 pc from Earth.
Which, if any, of the objects is the same size as object D?
Give this one a try later!
