Universe
11th Edition
ISBN: 9781319039448
Author: Robert Geller, Roger Freedman, William J. Kaufmann
Publisher: W. H. Freeman
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Chapter 2, Problem 15Q
To determine
If it is suggested to send a spacecraft to land on the surface of a celestial sphere, would it be said to be a good option.
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Thinking about the Scale of the Solar System As we discussed, the radius of the Earth is approximately 6370 km. The Sun, on the other hand, is approximately 700,000 km in radius and located, on average, one astronomical unit (1 au=1.5x108 km) from the Earth. Imagine that you stand near Mansueto Library, at the corner of 57th and Ellis. You hold a standard desk globe, which has a diameter of 12 inches, and you want to build a model of the Sun, Earth, and their separation that keeps all sizes and lengths in proportion to one another. a) How big would the Sun be in this scale model? Give your answer in feet and meters. b) The nearest star to the Solar System outside of the Sun is Proxima Centauri, which is approximately 4.2 light years away (a light year is the distance light travels in one year, or approximately 9.5x1012 km). Given the scale model outlined above, how far would a model Proxima Centauri be placed from you? Give your answer in miles and km.
Considering that Earth experiences an average intensity of
sunlight of 1330 W/m? and is at a distance from the Sun of
1.0 AU = 150 million km, and considering that that the
apparent magnitude of the Sun as seen from Earth is m =
-26.7, (a) then how far from the Sun would a distant Kuiper-
belt world need to be in order for the apparent magnitude of
the Sun to be m = -11.0 as seen on that world? Give your
answer in AU. (b) What would be the orbital period of this
world? Give your answer in Earth years.
EAn astronaut arrives on the planet Oceania and climbs to the top of a cliff overlooking the sea. The astronaut's eye is 100 m above
the sea level and he observes that the horizon in all directions appears to be at angle of 5 mrad below the local horizontal. What is
the radius of the planet Oceania at sea level? How far away is the horizon from the astronaut?
6000 km and 50 km
3600 km and 20 km
2000 km and 40 km
8000 km and 40 km
Chapter 2 Solutions
Universe
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Ch. 2 - Prob. 2CLCCh. 2 - Prob. 1QCh. 2 - Prob. 2QCh. 2 - Prob. 3QCh. 2 - Prob. 4QCh. 2 - Prob. 5QCh. 2 - Prob. 6QCh. 2 - Prob. 7QCh. 2 - Prob. 8QCh. 2 - Prob. 9QCh. 2 - Prob. 10QCh. 2 - Prob. 11QCh. 2 - Prob. 12QCh. 2 - Prob. 13QCh. 2 - Prob. 14QCh. 2 - Prob. 15QCh. 2 - Prob. 16QCh. 2 - Prob. 17QCh. 2 - Prob. 18QCh. 2 - Prob. 19QCh. 2 - Prob. 21QCh. 2 - Prob. 22QCh. 2 - Prob. 23QCh. 2 - Prob. 24QCh. 2 - Prob. 25QCh. 2 - Prob. 26QCh. 2 - Prob. 27QCh. 2 - Prob. 28QCh. 2 - Prob. 29QCh. 2 - Prob. 30QCh. 2 - Prob. 31QCh. 2 - Prob. 32QCh. 2 - Prob. 33QCh. 2 - Prob. 34QCh. 2 - Prob. 35QCh. 2 - Prob. 36QCh. 2 - Prob. 37QCh. 2 - Prob. 38QCh. 2 - Prob. 39QCh. 2 - Prob. 40QCh. 2 - Prob. 41QCh. 2 - Prob. 42QCh. 2 - Prob. 43QCh. 2 - Prob. 44QCh. 2 - Prob. 45QCh. 2 - Prob. 46QCh. 2 - Prob. 47QCh. 2 - Prob. 48QCh. 2 - Prob. 49QCh. 2 - Prob. 50QCh. 2 - Prob. 51QCh. 2 - Prob. 52QCh. 2 - Prob. 53QCh. 2 - Prob. 54QCh. 2 - Prob. 55QCh. 2 - Prob. 56QCh. 2 - Prob. 57QCh. 2 - Prob. 58QCh. 2 - Prob. 59QCh. 2 - Prob. 60QCh. 2 - Prob. 61QCh. 2 - Prob. 62Q
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- Give four ways to demonstrate that Earth is spherical.arrow_forwardAccording to the solar nebula theory, why is Earths orbit nearly in the plane of the Suns equator?arrow_forwardCompute for the scale height of a certain planet's atmosphere (the height the atmosphere would have if its density stayed constant instead of decreasing with altitude.) express your answer in meters. No unit is required for the final answer. radius of the planet = 6,371 km : density of air = 1.21 kg/m^3 Please answer asap.arrow_forward
- The International Space Station is about 90 meters across and about 380 kilometers away. One night it appears to be the same angular size as Jupiter. Jupiter is 143,000 km in size. Use S = r x a to figure out how far away Jupiter is in AU. Note 1 AU = 1.5 x 108 kmarrow_forwardIn the Tsiolkovsky's equation, the parameter “delta v”, could I use “delta v”as “v” in the equation v=sqrt(GM/r) or are they different. For example if a satellite is in a geosynchronous orbit with a “delta v” of 2km/s, could I use the 2km/s to calculate the radius of orbit? Thanksarrow_forwardWhat would be the angular diameter (in arc seconds) of a planet with diameter 8.5 x 105 km and orbital distance from it's star of 175 x 108 km as seen from a planet with. orbital distance from the same star of 70 x 107 km as seen from their closest approach?arrow_forward
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