105451. Which of the following planets takes the longest time to complete one revolution around the Sun?
105452. Which of the following planets takes the least time to complete one revolution around the Sun?
105453. Which of the following planets has almost the same mass, size and density as the Earth?
105454. Which planet was for the first time observed in 1930?
105455. Which of the following types of motion of the Earth has not produced any observable effect for centuries?
105456. All the planets, except one, in the Solar System rotate on their axes from west to east. Which is the exception?
105457. What percentage of the irregular surface of the Earth is covered with water?
105458. The three planets, farthest from the Sun in the ascending order of distance are?
105459. The maximum possible angle between the direction of Sun and that of a planet (as viewed from the Earth) is called?
105460. Which among the following stars flare up to greatly increased brightness and fade away after a short time?
105461. Who was the first to speculate that Venus is completely covered with clouds?
105462. Who was the first person to measure the size of another planet?
105463. "Galileo Satellites", named after their discoverer, are four large moons of the planet?
105464. The study of motion of which of the following planets around the Sun led Johannes Kepler to formulate his three laws about planetary motions?
105465. The number of constellations in the Milky Way Galaxy is?
105466. Which of the following planets reflects back to space the highest percentage of light it receives from the Sun compared to any other planet of the Solar System?
105467. All of the following planets have lesser diameter than the Earth, except?
105468. Who wrote the book "The Harmonies of the World"?
105469. The apparent motion of celestial objects like the stars, planets and satellites (as seen from the Earth) from east to west is?
105470. What will happen if the Earth were to stop its rotatory motion on its axis?
105471. Which of the following statements about the Sun in the celestial sphere or its role in the Solar System is not correct?
105472. Which of the following stars marks fairly precisely the position where the axis of rotation of the Earth cuts the celestial sphere?
105473. Which of the following makes the planet Saturn unique in the Solar family?
105474. Nearly what proportion of the total amount of Sun's energy coming to the Earth is directly reflected back into space by its top atmosphere?
105475. The Sun consists mostly of?
105476. The temperature at the surface of the Sun and its centre are, respectively, about '?
105477. Which of the following planets is farthest from the Sun?
105478. Which of the following planets is the biggest?
105479. Which of the following planets has only one natural satellite (or Moon) as the Earth has?
105480. Which of the following statements in regard to the planets of the Solar System is not correct?
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