The planet Mercury is diffcult to be observed most of the time because:
In 1610, Galileo Galilei discovered four moons of which planet?
Which of the following planets is known as 'Morning Star'?
The altitudes of a heavenly bodies appear to be greater then they actually are. This is due to:
Which two planets of the solar systme have no satellites?
Consider the following astral bodies: (1) Sirius (2) Venus (3) Mars The correct sequence in decreasing order of their brightness is :
Parsec' is the unit of measurement of:
Which planet looks reddish in the night sky?
The light coming from stars the idea of their:
Which one of the following planest takes the same number of days for rotation and revlution?
Which planet of the solar system spins on its axis at the fastest rate ?
The correct sequence of planets in the desending order of their equatorial diameter is :
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The period of one revolution of sun around the centre of galaxy is called:
Which of the planets is nearest to the earth?
Which planet is known as the 'Watery Planet' ?
One which of the following planets of the solar system does the sun rise in the west and set in the east?
Which of the following is the brightest planet?
Which of the following is the largest of the inner planets?
The length of its day and the tilt of its axis are almost identical to those of the earth'. This is true of:
The planet having thirteen moons is :
Which of the following planest of the solar system has the longest day?
Which planet is known as the Earth's Twin?
In order of their distance from the Sun, which of the following planets lie between Mars and Uranus?
The exact time taken by the earth for single rotation on its own axis is:
The same side of the moon always faces the Earth because: