21ST CENTURY ASTR.:STARS..(LL)-PACKAGE
21ST CENTURY ASTR.:STARS..(LL)-PACKAGE
6th Edition
ISBN: 9780393448450
Author: Kay
Publisher: NORTON
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Chapter 7, Problem 41QP
To determine

How much does the Sun’s brightness drop during the transmission.

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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.
F  =  9/5 C  + 32 ;          C  =  5/9  (F - 32);         K  =  273  +  C;      Lambda   =    2900/T;       T^4   =  I (128)(10^8);       I1/I2    = ( D2 / D1 )2 Show All Calculations What is the intensity of sunlight on planet XZEON if: The intensity of direct sunlight on earth is Ie = 2.0 calories per square centimeter per minute and Planet XZEON is 7.7 times farther from the sun than the earth is.
Please answer the following  A) Suppose an object takes 1000 years to orbit the Sun. How many times farther from the Sun is it, when compared with Earth?  B)  Communications with the spacecraft Alpha using radio waves require 2000 years for the round trip (there and back). This implies that Alpha is how many light years away from Earth?
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