Universe
11th Edition
ISBN: 9781319039448
Author: Robert Geller, Roger Freedman, William J. Kaufmann
Publisher: W. H. Freeman
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Chapter 15, Problem 13Q
To determine
The way in which it is possible to say that some asteroids are non-spherical, even if the images of such astroids are not available.
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It is believed there are 2.7 x 1012 comets in the Oort Cloud, which has a radius of 71000.0 AU. Calculate the average volume that each comet has to itself. Then take the cube root of the average volume per comet to find their typical spacing in AU.
The Near Earth Asteroid Rendezvous (NEAR), after traveling 2.1 billion kmkm, is meant to orbit the asteroid Eros at a height of about 15 kmkm. Eros is roughly 40km×km× 6km×km×6kmkm. Assume Eros has a density (mass/volume) of about 2.3×103kg/m32.3×103kg/m3.
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Chapter 15 Solutions
Universe
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- Give at least two reasons today’s astronomers are so interested in the discovery of additional Earthapproaching asteroids.arrow_forwardThe mass of the asteroids is found mostly in the larger asteroids, so to estimate the total mass we need to consider only the larger objects. Suppose the three largest asteroids-Ceres (1000 km in diameter), Pallas (500 km in diameter), and Vesta (500 km in diameter)-account for half the total mass. Assume that each of these three asteroids has a density of 3 g/cm3 and calculate their total mass. Multiply your result by 2 to obtain an estimate for the mass of the total asteroid belt. How does this compare with the mass of the Oort cloud?arrow_forwardWhat evidence indicates that some asteroids once had geologically active surfaces?arrow_forward
- How is the composition of meteorites related to the formation and evolution of asteroids?arrow_forwardIf a trillion (1012) asteroids, each 1 km in diameter, were assembled into one spherical body, how large would that the spherical body be? Compare that bodys size to the size of Earth given in its Celestial Profile. (Note: The volume of a sphere = 43r3.)arrow_forward
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