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The Earth
Question
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What is a light year?

Answer

A light year is a measure of distance and not of time and is equal to the distance travelled by light in one year. It is equal to 9.461 x1012km.

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Some More Questions From The Earth Chapter

Explain the stages considered in the development of planets.

What was the nature of the earth's surface initially ?

What were the gases which initially formed the earth's atmosphere ?

What is meant by process of differentiation ?

Describe Nebular hypothesis origin of planets.

What is the basic difference in the arguments related to the origin of the earth given by :


(a) Kant and Laplace


(b) Chamberlain and Moulton?

What is Nebula ?

Define Planetesimals

Why do planets differ in size and temperature ?

Name one galaxy.