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प्रश्न
Provide reliable evidence to prove that the earth is spherical in shape.
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उत्तर
The earth can be clearly seen spherical in the photographs from the satellite. Other proofs are the sight of the mast of a ship first before the ship appears, varying heights of the poles fired at different places at an interval of 5 km, through the Bedford Level Experiment and the sight of Pole Star at 90° from the North Pole and the view of the earth’s horizon as a circular from higher altitudes.
संबंधित प्रश्न
Give any two features of the earth that make it a ‘Unique Planet’.
Fill in the blank:
A typical galaxy may contain ___________ stars.
Mention two important features of Earth that make it a planet suitable for life.
Distinguish between the following pair.
Periodical and Non-periodical comets
Give reasons for the following:
Mercury completes its orbit in less time than the Earth.
Use your brain power!
Suppose you want to give your address to a friend you have on the planet Mars. How will you write your address if you want them to understand exactly where you live?
At the time of Perihelion, the Earth is ______ to the Sun.
The movement of the Earth on its axis is called.
The elliptical path in which the planets move around the Sun is ______.
______ is called Earth’s twin.
