This is the correct option. After the Sun, the next nearest star to the Earth is Proxima Centauri.

This is the correct option. As the pole star lies on the axis of rotation of the Earth, it appears stationary.

This is the correct option as all of them are  names of constellations.

This is the correct option. Ursa Major is also known as the 'Big Bear'.

This is the correct option. Mercury and Venus do not have natural satellites around them.

This is the correct option. Sirius is the brightest star in the night sky.

This is the correct option as all of the above orbit around the Sun. 

This is the correct option. Big Bear and Leo Major are visible only in summer season.

This is the correct option. Saturn has 30 satellites around it.

This is the correct option. Jupiter is the biggest planet in the Universe. It can accommodate 1331 Earths.

This is the correct option. Stars are the celestial objects that are extremely hot and have light of their own. Constellations are the group of stars which appear to form some recognisable shape or pattern. Planets are the large celestial objects which revolve around the Sun in closed elliptical paths called orbits.

This is the correct option. The planet Mercury can be seen either as a morning star just before the sunrise or as an evening star just after sunset because it lies inside the orbit of the Earth.

This is the correct option. Mercury and Mars are called the inner planets as they are nearer to the Sun.

This is the correct option. Venus is the brightest planet in the night sky because its cloudy atmosphere reflects 75 % of the light which it receives from the Sun.

This is the correct option. An asteroid is a small celestial object which revolves around the Sun between the orbits of Mars and Jupiter. A comet is a collection of gases and dust which appears as a bright ball of light in the sky with a long glowing tail when it comes close to the Sun. A meteorite is a meteor which does not burn up completely on entering the Earth's atmosphere.

This is the correct option as statement 'b' is a false statement. The heat and light of the stars is produced by  nuclear fusion reactions taking place inside them.

This is the correct option as it is the unit of measurement of distance in the Universe.

1 light year = 9.46 * 10¹² kilometre

This is the correct option. Mercury is the smallest planet in the Solar System with a diameter of 4880 km.

This is the correct option. Mars is also called the red planet as its surface appears red.

This is the correct option as statement 'c' is false. The Sun consists mostly of hydrogen, not nitrogen gas.

This is the correct option. Pole Star is not visible from the Southern Hemisphere of the Earth.

This is the correct option. Saturn has a well-developed system of colourful rings encircling it. The rings of Saturn are made up of tiny particles, all orbiting the Saturn like miniature satellites.

This is the correct option as none of these statements are false. The Earth rotates on an imaginary axis which passes through its North and South poles. The axis of rotation of Earth is slightly tilted with respect to the plane of its orbit around the Sun and as a result of the rotation of Earth on its axis, day and night and different seasons on the Earth are caused.

This is the correct option as this is a false statement. The night on which the whole bright disc of the Moon is visible from the Earth is called the full Moon day, not the crescent Moon.