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ASTRO 1504 EXAM 1 QUESTIONS AND ANSWERS
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ASTRO 1504 EXAM 1 QUESTIONSAND ANSWERS
is this horizon shown a real physical horizon or an imaginary plane that extends
from your observing location on Earth out to the stars? - ANSWER Imaginary
plane
Can the observer shown see a star when it is located below the horizon? Why or
why not? - ANSWER No, Because of how the horizon is at the bottom covered by
the equator earths in the way.
is either Star A or B ever in an unobservable position? if so, which position? -
ANSWER Star A: at position 4
Star B: at every position
When a star travels from a position below the observer's horizon to a position
above the observer's horizon,is that star rising or setting? - ANSWER rising
When a star travels from a position above the observer's horizon to a position
below the observer's horizon, is that star rising or setting? - ANSWER setting
Star A is just visible above your eastern horizon at Position 1. At which of the
numbered positions is it just visible above your western horizon? - ANSWER
position 3
at which position if any does star b rise and set - ANSWER It doesn't rise or set
S1: locations B1 and B3 are on my horizon because they are rising and setting just
like A1 and A3
S2: Figure 1 shows that Star B is as low as it will get when it is just above the
northern horizon at B4. So Star B never goes below the Horizon.
Do you agree or disagree with either or both of the students? Explain your
reasoning - ANSWER Disagree with S1 because B1 and 3 dont go below
, Agree with student 2 because star B never goes below the horizon, never sets.
For each indicated position, describe where in the sky you must look to see the star
at that time. - ANSWER A1: East, low
A2: South, High
A3: West, low
A4: not visible
North Star: north, high
B1: northeastern high
B2: directly overhead
B3: northwest, high
B4: north, low
Does Star B ever set? - ANSWER no
Note in figure 1 that the position of star b at 6pm has been identified for you. Circle
the numbered position (1,2,3,4) in figure 2 that corresponds to the identified
location of star B at 6pm provided in figure 1. - ANSWER identical location is 3
Using figure 2, describe the direction you have to look to see star B at 6am? -
ANSWER Zenith that is the top
the position directly overhead is called the zenith label the directions on figure 2.
How does the direction of the zenith compare to the direction that you identified in
Question 3? - ANSWER same, never changes
using figure 2 describe in words where you look to see Star A when it is halfway
between rising and setting? - ANSWER 45 south
S1: stars move east to west so any star rising directly in the east must be moving
straight up so that it can end up in the west. if the arrow were angled, the star would
not set in the west.
S2: I disagree from figure 2 the path of Star A starts in the east, then it moves high
in the southern sky yet still sets in the west. To do this it has to move toward the
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