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The Daily Telegraph News in Action 4
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News in Action 4 (1999)(Daily Telegraph)[Mac-PC].iso
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01070_Text_GCSE Activity Window Template.txt
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1999-02-05
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517b
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Student helps to discover new planet
1. a) Which SI units would be used to measure the following quantities:
i) Size ii) Mass iii) Temperature iv) Luminosity?
b) Find out the accepted values for the Sun.
2. If the radius of the earth is 6.4 x 106m, calculate the approximate size of the new planet.
3. a)What is the definition of a light year?
b) Calculate the approx distance of the new planet from the earth in km.
c) Why are astronomical distances usually measured in light years?