Physics, asked by dmanojan5200, 1 year ago

Is it wrobg to say that sun rises because sun never rises sun is fixed at its position its the earth which is moving and chnaging ita position?

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Answered by kameena1
2

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Firstly, let us try and get rid of some misconceptions:

1) The Earth does not revolve around any planet. It does orbit the Sun, though, once a year (only Moons orbit planets),

2) The Sun is not fixed in space either. It orbits the centre of our galaxy called the Milky Way once in about 250 million years. In fact our galaxy is not immobile either but that is another story.

The Earth is like a giant magnet. By convention, what we call the North Magnetic Pole is near (and towards) the North Geographic Pole. When our ancients discovered that a bar magnet suspended in air would invariably come to rest with the same end pointing in the same direction, they realised that it could be used for finding their direction of movement on terrestrial Earth. They then designated the end of the magnet that always pointed to the North Geograpical Pole as the North Magnetic Pole. In order to provide a nomenclature to directions other than North, they decided that when looking North, with arms outstretched, the left hand woluld point in a direction that they called west and likewise the side that the right hand pointed was the East. The back, of course, lies in the same direction as the opposite (ie South) end of the bar magnet.

Now, if you were to look down from space from the direction where the North Magnetic Pole lies you would find that the Earth is spinning anti-clockwise on its axis. Thus, as it spins, different terrestrial areas of the Earth spin into the area irradiated by the Sun while, on the opposite side (laterally), the terrestrial region recedes into the non-irradiated part which we call night. One revolution of the Earth on its own axis whereby it gets irradiated once by the Sun till it sinks into darkness before being exposed to the Sun again constitutes one day on Earth.

Now, at sunrise on any day just stand facing the direction your compass says is North. You will find that the sun rises from the direction of your right hand which is designated as the East. The Sun, after traversing the sky in the course of the day then sets approximately in a direction opposite from where it rose which we have designated the West.

This is why we say that the Sun rises in the East and sets in the West.

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