Solar system was discovered by:

A. Kepler

B. Galileo

C. Copernicus

D. Plato

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Which planet is known as watery planet?

A. Mercury

B. Earth

C. Mars

D. Jupiter

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Among the planets of the solar system, the one which has the longest period of rotation is:

A. Mars

B. Venus

C. Saturn

D. None of these

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Which of the following planet is dropped from the list of planets in 2006?

A. Neptune

B. Mercury

C. Pluto

D. Jupiter

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Which planet of the solar system spins on its axis as the fastest rate?

A. Mercury

B. Earth

C. Jupiter

D. Saturn

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The temperature of sun’s outer surface is:

A. 600 °C

B. 6000 °C

C. 500 °C

D. 5000 °C

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Which of the following planets is known as “Morning Star”?

A. Mercury

B. Venus

C. Mars

D. Saturn

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