Tag: our solar system

Questions Related to our solar system

The earth spins about its axis from

physics our solar system planets of the solar system solar system and sun introduction to solar system

  1. west to east

  2. east to west

  3. north to south

  4. south to north

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Correct Option: A
Explanation:

Earth spins about its own axis from west to east. In another word earth turns counter clockwise direction as viewed from north pole.

The mean distance between Earth and Sun is referred to as one

physics our solar system planets of the solar system solar system and sun introduction to solar system

  1. light year

  2. fermi

  3. astronomical unit

  4. angstrom

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Correct Option: C
Explanation:

On Astronomical unit is the mean distance between earth and sun.

Days and nights are caused by

physics our solar system planets of the solar system solar system and sun introduction to solar system

  1. rotation of the Earth

  2. revolution of the Earth

  3. both rotation and revolution of the Earth

  4. neither rotation nor revolution of the Earth

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Correct Option: A
Explanation:

As earth is rotating on its own axis so its half part is exposed to sun cause day at that part and hidden half part suffers from darkness called night.

All the stars appear to move from

physics our solar system planets of the solar system solar system and sun introduction to solar system

  1. west to east

  2. east to west

  3. north to south

  4. south to north

Show answer
Correct Option: B
Explanation:

As earth is rotating on its own axis from west to east so, due to relative motion star appears to move from east to west.

The planet which shows retrograde motion is

physics our solar system planets of the solar system solar system and sun introduction to solar system

  1. Venus

  2. Mercury

  3. Jupiter

  4. Mars

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Correct Option: A
Explanation:

Ans : Venus

The planet Jupiter is bulged at the centre and flattened at the poles because of ___________.

physics our solar system planets of the solar system solar system and sun introduction to solar system

  1. movement of gases

  2. heaviness of the planet

  3. rotation of the planet

  4. revolution of the planet

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Correct Option: C

Which of the following planets takes maximum time to complete one revolution around the Sun?

physics our solar system planets of the solar system solar system and sun introduction to solar system

  1. Mercury

  2. Jupiter

  3. Saturn

  4. Neptune

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Correct Option: D
Explanation:

Neptune takes maximum time to complete one revolution as it is the farthest planet.

Ans: Neptune

The planets revolve round the sun in _______ orbits.

physics our solar system planets of the solar system solar system and sun introduction to solar system

  1. circular

  2. spiral

  3. elliptical

  4. helical

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Correct Option: C
Explanation:

Ans: Elliptical 

The difference in the length of a mean solar day and a sidereal day is about

physics our solar system planets of the solar system solar system and sun introduction to solar system

  1. $1$ minute

  2. $4$ minute

  3. $15$ minute

  4. $56$ minute

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Correct Option: B
Explanation:

Solar day is the time taken by earth to complete one rotation about its axis with respect to sun. Sidereal day is the time taken by earth to complete one rotation about its axis with respect to distant star. There is a difference of $4$ minutes between solar day and sidereal day. Solar day is longer as earth has to rotate greater angle to attain same position with respect to sun due to its own motion (revolution) round the sun. Its position with respect to distant star remains almost fixed.

If the axis of rotation of the earth were extended into space then it would pass close to

physics our solar system planets of the solar system solar system and sun introduction to solar system

  1. The moon

  2. The sun

  3. The polar star

  4. The centre of mass of all the planets in the solar system

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Correct Option: C
Explanation:

A pole star is a visible star, which lies approximately directly overhead when viewed from earth's north pole or south pole. In practice the term pole star usually refers to polars, which is the current northern pole star, also known as north star. The south celestial pole lacks a bright star like polarise to mark its position.