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    Astronomers sometimes measure distances in astronomical units,where, 1 AU=1.496 ×10  to the power of 11 meter.the mean distance from Earth to sun,why is this useful for distances within our solar system?

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Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

Related questions

The Mars Polar Lander spacecraft was launched on January 3, 1999.On December 3, 1999, the day that Mars Polar Lander touched down onthe Martian surface, the positions of the earth and Mars were givenby these coordinates:

x y z
Earth 0.3182 AU 0.9329 AU 0.0000 AU
Mars 1.3087 AU -0.4423 AU -0.0414 AU

In these coordinates, the sun is at the origin and the plane of theearth's orbit is the xy-plane. The earth passes through the +x-axisonce a year on the autumnal equinox, the first day of autumn in thenorthern hemisphere. One AU is equal to 1.496 * 10^8 km, theaverage distance from the earth to the sun.

a) In a diagram, show the positions of the sun, the earth, and Marson December 3, 1999.

b) Find the following distances in AU on December 3,1999 :

i) from the sun to the Earth


ii) from the sun to Mars


iii) from the earth to Mars



c) As seen from the earth, what was the angle between the directionto the sun and the direction to Mars on December 3, 1999?

hallleys comet follows an elliptical orbit around the sun. at its closest approach itis a distance of 0.59 AU from the sun and at its farthest distance is 35 AU form the sun. if the speed when its closest to the sun is 5.4*10^4 m/s what is the speed when its the farthest from the sun? (1 AU 1.496*10^11 m)

The astronomical unit (AU) is defined as the mean center-to-center distance from Earth to the Sun, namely 1.496x10^(11) m. The parsec is the radius of a circle for which a central angle of 1 s intercepts an arc of length 1 AU. The light-year is the distance that light travels in 1 y. (a) How many parsecs are there in one astronomical unit? (b) How many meters are in a parsec? (c) How many meters in a light-year? (d) How many astronomical units in a light-year? (e) How many light-years in a parsec?

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