Question

explain the method to determine distance of the planet which is far away​

Answer 1

Answer:

paralax method

Explanation:

Parallax is a displacement or difference in the apparent position of an object viewed along two different lines of sight, and is measured by the angle or semi-angle of inclination between those two lines.

Answer 2

Answer:

parallex method

Explanation:

1. parallax method is used to determine distance of different planet from the earth
2. To measure the distance D of far distant planet S, select two different observations (E1 and E2)
3. The planet should be visible from E1 and E2 observatories simultaneously that is at the same time
4. E1 and E2 are separated by distance 'b' as shown in figure above therefore E1*E2=b
5. The angle between the two directions along which the planet is viewed, can be measured. It is parallax angle, which in the case is E1SE2=theta
6. The planet is far away from the observers,hence

b<<D

therefore b <<1 and 'theta' is very

D.

small angle

Hence,E1 E2 can be considered as

arc of length b of circle with S as

centre and D as radius

therefore E1S=E2S=D

therefore theta= b ..(theta radian)

D

therefore D= b.

theta

Thus, the distance D of far away planet S can be determined using the parallex method

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