Question

Q1. Fill in the blanks:

1. The planet which is the farthest from the Sun is __________

2. The planet which appears reddish and in colour is __________

Q2. Answer the following question in short :

1. why is the distance between start expressed in light years? what do you understand by the statement that a star is eight light years from the earth ?


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Answer 1

Answer:

1. Neptune

2. Venus

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Answer 2

1 .The planet which is farthest from the Sun is Neptune.

2. The planet which appears reddish in colour is Mars.

ANSWER : 1 Distance between stars are very large in magnitude. Hence a new unit is required so that the value of distance is not too big and is sensible. A light year is defined as the distance travelled by light in one year.

Distance between stars are very large in magnitude. Hence a new unit is required so that the value of distance is not too big and is sensible. A light year is defined as the distance travelled by light in one year. 1 ly=9.461×10 (12) km

km8 ly=7.57×10 (13)km

kmA star is eight light years away from earth means that light from the star takes 8 years to reach the earth's surface. As shown above, its approximate distance from the earth is 7.6×10 (13)km.

may its helpful for u dear :)