Physics 160 test 4
Study online at https://quizlet.com/_i0nklq
1. why do we have to enlist amateurs to measure an occupation?: the occultation time
depends on the position of the observer in the path of the shadow
2. in what direction is the storm rotating CW or CCW?: CCW as can be inferred from the wake
of the storm. this was confirmed by the space probe voyager 1 that took a time-lapse of the storm.
3. is it south or north of the equator?: south of the equator
4. what is the hedgehog theorem? and how does that explain the storm we
have?: if you have a wind on a spherical surface, there must be a vortex somewhere. also think of this as a "no-comb"
theorem.
5. how was it possible to reach Saturn in only 7 years?: the slingshot effect was used to take
advantage of the rotation of Venus, earth and Jupiter.
6. what kind of power did it use? solar panels? why?: nuclear. the sun radiation is too weak
for solar panels at Saturn's distance.
7. what feature of Saturn is called after Cassini: the large gap in the rings.
8. mercury: is the fastest roman god.
only has an exosphere.
liquid/molten interior of metal.
1/3 the size of earth.
no moons.
magnitude (max) -2.48
9. venus: the god of love.
thick atmosphere.
solid/molten interior of metal (uncertain)
almost the size of earth.
no moons
magnitude (max) -4.14
10. what is the meaning of a negative magnitude?: contrary to what you might think, the larger
the number the fainter the star. negative numbers are very bright objects.
11. which planets have moons and which ones do not?: only mercury and Venus lack moons
12. why is the magnitude of Venus so variable?: because of its phases; our location make it look
like a crescent sometimes.
13. if the picture is in the infrared,, how come we see colors in the picture of
Uranus?: they are false colors, assigned to infrared wavelengths.
1/2
Study online at https://quizlet.com/_i0nklq
1. why do we have to enlist amateurs to measure an occupation?: the occultation time
depends on the position of the observer in the path of the shadow
2. in what direction is the storm rotating CW or CCW?: CCW as can be inferred from the wake
of the storm. this was confirmed by the space probe voyager 1 that took a time-lapse of the storm.
3. is it south or north of the equator?: south of the equator
4. what is the hedgehog theorem? and how does that explain the storm we
have?: if you have a wind on a spherical surface, there must be a vortex somewhere. also think of this as a "no-comb"
theorem.
5. how was it possible to reach Saturn in only 7 years?: the slingshot effect was used to take
advantage of the rotation of Venus, earth and Jupiter.
6. what kind of power did it use? solar panels? why?: nuclear. the sun radiation is too weak
for solar panels at Saturn's distance.
7. what feature of Saturn is called after Cassini: the large gap in the rings.
8. mercury: is the fastest roman god.
only has an exosphere.
liquid/molten interior of metal.
1/3 the size of earth.
no moons.
magnitude (max) -2.48
9. venus: the god of love.
thick atmosphere.
solid/molten interior of metal (uncertain)
almost the size of earth.
no moons
magnitude (max) -4.14
10. what is the meaning of a negative magnitude?: contrary to what you might think, the larger
the number the fainter the star. negative numbers are very bright objects.
11. which planets have moons and which ones do not?: only mercury and Venus lack moons
12. why is the magnitude of Venus so variable?: because of its phases; our location make it look
like a crescent sometimes.
13. if the picture is in the infrared,, how come we see colors in the picture of
Uranus?: they are false colors, assigned to infrared wavelengths.
1/2
