PHSC 121 Exam 2024-2025 Edition.
Questions & Correct Answers.
Graded A+
- ANSDescribe the idea of the mythical sunstone and how it required at
least basic knowledge of the motions in the heavens to use it.
-50 degrees - ANSIf you live at 40 degrees north latitude, what declination
value for stars would make them impossible to view from your northern
location?
0.5 pc - ANSA star is measured with a parallax angle of 2" (arc seconds).
How distant is the star in parsecs?
0h - ANSWhat is the right ascension of the sun in the sky on the vernal
(spring) equinox?
1. The planets are in an elliptical orbit with the sun as the one focus.
2. The planets have an equal orbit to the space they are in. The space is
equal between each planet.
3. T^2/a^3 - ANSList two of Keplers three laws of planetary motion
18h - ANSWhat is the right ascension of the stars on your meridian at
midnight on the summer solstice?
, 1x10^8 - ANSHow do you write million in scientific notation?
2 - ANSHow many tides are there per day at most locations on earth?
23.5 degrees - ANSWhat is the declination of the sun on the summer
solstice?
400.4 nm - ANSA very distant galaxy emits light at 400 nm, but is moving
away from earth at 300km/s. What wavelength is measured?
4h - ANSWhat is the right ascension of the stars on your meridian at 10pm
on the winter solstice?
5000 years - ANSHow long ago was astronomy first practiced?
700MPc - ANSAt what rate is a galaxy 10MPc from earth receding from
us? Use H=70km/s/MPc
A satellite tracking earth from two different positions in orbit - ANSDistance
of stars measured by parallax is done from
A. Dark matter - ANSWhich of the following accounts for the fact that there
is more mass and gravity in galaxies we see than can be detected in
ordinary matter (which leads to faster galactic rotation than we'd otherwise
expect)?
A. Dark matter
B. Dark energy
Questions & Correct Answers.
Graded A+
- ANSDescribe the idea of the mythical sunstone and how it required at
least basic knowledge of the motions in the heavens to use it.
-50 degrees - ANSIf you live at 40 degrees north latitude, what declination
value for stars would make them impossible to view from your northern
location?
0.5 pc - ANSA star is measured with a parallax angle of 2" (arc seconds).
How distant is the star in parsecs?
0h - ANSWhat is the right ascension of the sun in the sky on the vernal
(spring) equinox?
1. The planets are in an elliptical orbit with the sun as the one focus.
2. The planets have an equal orbit to the space they are in. The space is
equal between each planet.
3. T^2/a^3 - ANSList two of Keplers three laws of planetary motion
18h - ANSWhat is the right ascension of the stars on your meridian at
midnight on the summer solstice?
, 1x10^8 - ANSHow do you write million in scientific notation?
2 - ANSHow many tides are there per day at most locations on earth?
23.5 degrees - ANSWhat is the declination of the sun on the summer
solstice?
400.4 nm - ANSA very distant galaxy emits light at 400 nm, but is moving
away from earth at 300km/s. What wavelength is measured?
4h - ANSWhat is the right ascension of the stars on your meridian at 10pm
on the winter solstice?
5000 years - ANSHow long ago was astronomy first practiced?
700MPc - ANSAt what rate is a galaxy 10MPc from earth receding from
us? Use H=70km/s/MPc
A satellite tracking earth from two different positions in orbit - ANSDistance
of stars measured by parallax is done from
A. Dark matter - ANSWhich of the following accounts for the fact that there
is more mass and gravity in galaxies we see than can be detected in
ordinary matter (which leads to faster galactic rotation than we'd otherwise
expect)?
A. Dark matter
B. Dark energy
