WorksheetsAstro 3- HW 1
Total questions: 20
Worksheet time: 10mins
If Venus has an angular diameter of 30 arcseconds, how does this compare with the angular diameter of the full moon? Compared to the moon, Venus is about -
the same size
30 times larger
1/3600 as large
1/30 as large
1/60 as large
What is the range of possible values for Right Ascension?
0 to 12 hours
0 to 23 hours
0 to 90 degrees
0 to 180 degrees
The mean distance from Earth to the sun is 384,400 km. This can be written as
3.844 x 10-3 km
3.844 x 10-6 km
3.844 x 104 km
3.844 x 105 km
If the moon rises at 6pm tonight, then tomorrow night it will rise at
the same time
12 am (midnight)
7 pm
5 pm
The altitude of the Celestial Pole at your location is equal to your —
latitude.
longitude.
declination.
azimuth
right ascension.
The direction of motion of the moon in the sky, against the background of stars, is —
sometimes west to east but mostly east to west.
always west to east.
always east to west.
mostly west to east but sometimes east to west.
The moon subtends an angle of 30 arcminutes as seen from Earth. This angle is —
half a degree.
all of these
less than one radian.
more than 60 arcseconds.
none of these
The star alpha Centauri will return to exactly the same position in an observer's sky in what time period?
24 hours 4 minutes
0.25 days
23 hours 56 minutes
365.25 days
24 hours exactly
What is the zodiac?
The projection of the earth's equator on the celestial sphere.
The circle of 56 chalk-filled holes at Stonehenge.
The path that the earth's pole makes on the celestial sphere over 26,000 years.
The path of totality on the earth's surface during a solar eclipse.
The set of constellations through which the ecliptic passes.
When the moon is directly opposite the sun in the sky, its phase is
new
full
the moon can never be opposite the sun in the sky.
gibbous
Where is Polaris at noon? Assume you are in L.A.
0° altitude, 33° azimuth
0° altitude, 0° azimuth
23 1/2° altitude, 90° azimuth
33° altitude, 180° azimuth
33° altitude, 0° azimuth
Without some indication of uncertainty, a scientific data point is useless.
true
false
A light year is defined as the
time it takes the earth to orbit the sun once.
distance traveled by light in one year.
30,000 kilometers/second.
time it takes light to travel to the nearest star.
distance to the nearest star.
About when is a full moon seen near the western horizon?
midnight
noon
sunrise
sunset
How long is the interval from full moon to full moon?
30 days
27 days
29 days
14 days
What is the ecliptic?
The path that the earth's polar axis makes on the celestial sphere during its precessional cycle.
The path of totality on the earth's surface during a solar eclipse.
The sun's yearly path on the celestial sphere.
The projection of the earth's equator on the celestial sphere.
What is the interval from full moon to full moon called?
sidereal month
ecliptic month
solar day
sidereal day
synodic month
When a solar eclipse occurs, there are two different shadows, one being smaller and darker than the other. What is the name for the smaller shadow?
sombra
umbra
penumbra
diamond ring
You are at a place on earth where all stars are circumpolar. What is your latitude?
-23 1/2°
+23 1/2°
90
there is no such place
0° (equator)
Which of the following is the most difficult problem to solve when doing a statistical study of a sample of a population?
sample size
random errors
systematic errors, or biases
sample selection
