The relative positions of the stars in the night sky:

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Are absolutely fixed and therefore we can name constellations with certainty.

Change appreciably over about four thousand years, which is why the ancient. Egyptians named different constellations than those of today.

Are changing, but very slowly such that appreciable change cannot be observed even over several centuries or even several thousand years.

Appears to change because the sun moves among them over the course of a year.

answer is C.

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Detailed Solution

:
Concept: The areas of our sky where the stars appear to move are divided into two categories. One reason is the Earth's rotation, while another is the Earth's movement in relation to the Sun. The Earth round the Sun once a year.
Gravitational potential energy is the energy that an object has or obtains when its position changes as a result of being in a gravitational field. An energy that is linked to gravity or the gravitational field is known as gravitational potential energy.
Everything in nature aspires to have as little energy as possible. Planetary objects often stay put by avoiding areas of greatest gravitational potential energy and staying at a distance from their current location.
Hence, the correct answer is option 3.

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