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Measurement of size of a planet
Measurement of size of a planet
- If d is the diameter of a planet, the angle subtended by it at any single point on the Earth is called angular diameter of the planet.
- If d is the diameter of a planet, the angle subtended by it at any single point on the Earth is called angular diameter of the planet.
- Let (angle earth) be the angle between the two directions when two diametrically opposite points of the planet are viewed through a telescope as shown in Fig.
- Let (angle earth) be the angle between the two directions when two diametrically opposite points of the planet are viewed through a telescope as shown in Fig.
- As the distance D of the planet is large (assuming it has been already measured), we can calculate the diameter of the planet.
- As the distance D of the planet is large (assuming it has been already measured), we can calculate the diameter of the planet.
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