What is real motion in astronomy?

Answer 1

Throughout the year the earth moves around the Sun. As a result, the Sun appears to move around the sky once with respect to see the stars from Earth. Earth takes about one year ( 365 days and a quarter) to travel around the Sun. Since the earth moves around the sun, we are resident o the earth, it means that the Sun appears to shift in the sky 1 degree every day

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Answer 2

Motion is always defined relative to something. On Earth, motion is relative to the ground, and our brains are usually locked into that fact. The Earth's orbit is generally described as circling the Sun, and of course, the Earth spins on its axis, but let's not consider that as relative motion, for now.

As the earth orbits the Sun, what is the Sun doing? Is it orbiting something else, which means that the Earth is both orbiting the Sun and something else? And what describes the Earth's orbit if that 'something else' is itself orbiting something else?

In terms of Earth's real motion, there are probably computer simulations that can show something like the Earth's 'real' motion, but that would be meaningless to you and me without that motion being relative to a another 'something'. Einstein made this more clear in his Special Theory of Relativity. . . well, clear to other scientists, anyway.

To further complicate matters, the Earth and its Moon orbit each other, too, at the same time that they both orbit the Sun. Wo!

Answer 3

Relative motion is motion COMPARED TO the observer, or to the equipment being used to observe the motion. Relative to the driver of the car, his passenger is not moving. But relative to the person standing at the bus stop, the same passenger in that car is zooming by at high speed. Relative to your seat in the airplane, you're not moving at all, and you can get comfortable and take a nap. But relative to anybody down on the ground, you may be moving almost 10 miles a minute ! and you'll cross half a dozen states before you wake up.

Answer 4

It doesn't.

"Observable", that is. Stars each have their own "proper motions" as they move through the Milky Way; our Sun is a star, so it has its own proper motion through space. But no matter how fast the star is moving, they are all so far away that it takes CENTURIES for the movement to be measurable. The star charts created by Ptolemy 1900 years ago and translated into Arabic, which became the basis of the "Almagest", are still, 50 generations later, "close enough".

Answer 5

It is a motion that can be moved in any which direction that it mass of force is pulling

Answer 6

real motion is when an object actually moves

Answer 7

apparent motion is what the motion seems to be from the point of view of the person on earth watching

actual motion is what it is actually moving

Answer 8

Apparent motion is motion that appears to happen. You see something that appears to move, but it might have stayed still while actually you were the one that was moving.

Answer 9

It's a motion that seems real but isn't. It's really the Earth's rotating that makes the stars seem to move across the sky.

Answer 10

Because the stars are very far from Earth