Understanding Earth's Time Difference from the Sun: 16-Minute Delay Explained

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  • Thread starter Ross B
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If you want to pursue more discussion of how relativity affects our view of the sky, please start a new thread in the appropriate forum.
  • #1
Ross B
if u stand on the sun and look at the earth, the Earth will appear to be 16 minute behind where it actually is as the light eave the sun, 8 minutes to reflect off the Earth and 8 minutes back to your retina, is that correct?
 
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  • #2
Ross B said:
is that correct?

No. The only relevant time delay is from when the light leaves Earth to when it reaches you on the Sun. The fact that the light originally came from the Sun and was reflected off the Earth doesn't matter.

(The time delay is also frame-dependent, which is relevant since you posted this in the relativity forum.)
 
  • #3
if u have a sun orbited by 2 equidistant Earth's, circular orbits, the Earth's are diametrically opposed to each other. If you are standing on the sun will the 2 Earth's appear 8 minutes behind where they actually are?
 
  • #4
Ross B said:
If you are standing on the sun will the 2 Earth's appear 8 minutes behind where they actually are?

The answer to this should be obvious from the answer to your previous question.
 
  • #5
@Ross B , a few general notes, since you are new to PF. First, welcome!

Second, you will notice that I have changed the level of this thread to "B". An "I" level indicates a college undergraduate level understanding of the subject matter. It does not appear that you have that.

Third, please take some time to think through your questions before posting. I have deleted a number of posts that are too confused and jumbled to lead to a useful discussion. Also, it would probably be helpful for you to take some time to work through a good introductory textbook on relativity--but even before that, if you don't already have a decent working understanding of classical (pre-relativity) physics, you should work through a good introductory textbook on that.

I have closed this thread as the substantive question you asked has been answered.
 

1. How is Earth's time difference from the sun calculated?

The time difference between Earth and the sun is calculated by measuring the amount of time it takes for sunlight to travel from the sun to Earth. This is known as the "light travel time" and is approximately 8 minutes and 20 seconds.

2. What causes the 16-minute delay in Earth's time difference from the sun?

The 16-minute delay in Earth's time difference from the sun is due to the Earth's orbit around the sun. The Earth's orbit is not a perfect circle, so at certain points in its orbit, it is closer or farther away from the sun. This results in a slight variation in the light travel time between the sun and Earth, causing the 16-minute delay.

3. How does the 16-minute delay affect our perception of time on Earth?

The 16-minute delay in Earth's time difference from the sun does not have a significant impact on our perception of time on Earth. Our daily routines and timekeeping systems are based on the rotation of the Earth and not the position of the sun, so the delay is not noticeable in our day-to-day lives.

4. Are there other factors that can affect the time difference between Earth and the sun?

Yes, there are other factors that can affect the time difference between Earth and the sun. One major factor is the tilt of the Earth's axis, which causes the change in seasons and can also impact the distance between the sun and Earth. The Earth's atmosphere can also affect the light travel time, as it can slow down or bend the light, resulting in a slightly longer time difference.

5. How do scientists account for the 16-minute delay in their research and calculations?

Scientists take the 16-minute delay into account when conducting research and making calculations related to the sun and Earth. They use precise instruments and measurements to calculate the exact light travel time and adjust their calculations accordingly. This allows for accurate and reliable results in their studies and experiments.

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