Q. In the black hole, the volume of singular region is

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Q. The most primitive bodies in the solar system are

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Q. The name of the tails of the comets are

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Q. Orbits of the comets are

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Q. The closest point to the Sun in the orbit of comet is known as

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Q. Main body of a space 'comet' is called

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Q. Which is not the part of greenhouse gases

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Q. Percentage of oxygen in the atmosphere of Earth is

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Q. Second most abundant constituent of dry air in terms of volume after nitrogen is

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Q. Most abundant constituent of dry air in terms of volume is

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Q. Percentage of nitrogen in the atmosphere of Earth is

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Q. The surface temperature of planet 'Earth' is

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Q. The Polar diameter of planet 'Earth' is

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Q. Magnetic field of Earth protects the planet from effects of

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Q. Powerful magnetic field of Earth was due to its core of

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Q. Orbit distance of planet Earth is

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Q. The only planet in Solar System which is not named to Roman or Greek diety is

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Q. Largest territorial planet of Solar System is

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Q. Considering facts about Earth, the number of notable moons of planet Earth is

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Q. Considering facts about Earth, the orbit period of planet Earth is

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