The fact that the position of the constellations changes throughout the year is evidence the Earth is what?

Question

Is is that the earth is rotating, revolving or the sun is rotating or revolving?

Answer 1

It is evidence that Earth is revolving around the sun.

If Earth were not revolving around the sun, the same stars would rise and set at the same times, night after night. But since the stars appear to change positions by about 1 degree each night compared to the same time the previous night, and this cycle appears to make a full cycle every 365 days, this implies that we are revolving around the sun once per 365 days.

But this has nothing to do with parallax or wobble or axis tilt. Parallax is the slight change in position of closer stars relative to farther stars over the course of our 1-year trip around the sun. Wobble (precession) is a slow gradual change, over thousands of years, of the direction of Earth's axis relative to distant stars. Axis tilt is evidenced by the fact that the sun is much further south at noon on the first day of winter than it is at noon on the first day of summer.

Answer 2

Not A. The rotation of Earth would only make an impact on the position of constellations during a single day, not "throughout the year". Thus, we must assume you are not referring to the constellations' progress through the sky on a single night. Not C. The rotation of the sun has no bearing on the apparent position of the constellations as viewed from Earth. Not D. The revolution of the sun about the galactic core does affect constellation position, but over a very long time. It's impact over a single year is insignificant. So your answer is B. To be more accurate, though, it is due to Earth's axial tilt, not just its revolution about the sun. If Earth had zero axial tilt along the ecliptic, then the positions of the constellations would remain relatively fixed throughout a single year. (This is also the reason the sun's position changes, appearing closer to the horizon during the winter months, and thus the cause of seasonal weather patterns.)

Answer 3

It's evidence that the Earth orbits the Sun. There is a parallax effect, wherein the positions of the stars change slightly over the course of the year as the Earth moves to the opposite side of the Sun. It's essentially the same thing as when you hold your finger in front of your face and close one eye and then the other; your finger seems to jump back and forth. Celestial parallax occurs on a grander scale, because the point of observation moves 180 million miles instead of 2 inches, and the objects being observed are proportionately much further away. That's also why the effect is relatively small; it is useful for determining the distances of stars that are relatively close, and many stars within our own galaxy are too far away to use this method.

Answer 4

The Earth is tilted on its axis 23.5 degrees and revolving around the Sun and the fact that the Earth is a sphere.

Answer 5

Revolving around the sun.

Answer 6

Revolving around the Sun. As we revolve around the sun the back drop of constellations moves as well. Picture walking around a pole in a playground (Pole being sun, you being Earth). You start your revolution with a merry go round behind the sun (merry go round symbolizes constellation). As you move around the pole different playground objects are behind the pole, a swing set then a sand box as you move more around the pole...until you move all the way back to your original position with merry-go-round in back of pole.

Answer 7

It's evidence that earth is orbiting the sun.

Answer 8

Evidence that we move(wobble), in orbit, arround a spinning sun, through drifting universe

Answer 9

round and rotate