i was thinking about that recently, if that is a huge distance, does someone see the same night sky?? the same moon and stars?? because it’s a big distance i think, it would make sense for them to maybe see another set of stars further away from the ones that i see!!
i was talking about this with my long distance husband recently, if at night, he sees the same stars i see!!!
Depends. Do they live 1900 miles north or south of you? Or east/west from you. Because the moon only changes perspective north and south. Better chance if the equator is between you as well.
The method of induction is typically used to prove statements about integers within mathematical proofs, but we can attempt an analogy to argue for the similarity of the night sky over distances like 1,900 miles.
Step 1: Define the Claim
We aim to show that two observers separated by 1,900 miles see essentially the same night sky. This means the arrangement of stars and celestial objects appears nearly identical.
Step 2: Base Case
Consider two observers who are standing very close together—say, just a mile apart. At such a small separation, the difference in their viewing angles of celestial objects is negligible, meaning they see essentially the same night sky.
Consider that you can repeat this step for a third person, compared with the second person, and then compare the night sky for the third person and the first, and so on.
Step 3: Inductive Step
Assume that for a given separation distance d, two observers see nearly the same night sky. We now show that an observer moving an additional small distance \Delta d (e.g., a mile farther) still sees nearly the same sky.
Since the stars are incredibly far away—on the order of light-years—the difference in viewing angle due to moving a mile (or even dozens of miles) is minuscule. The shift in perspective for each star, given the vast distances involved, is negligible. Therefore, if the night sky is essentially the same for an observer at d miles, it will also be the same for an observer at d + \Delta d miles.
By repeating this argument iteratively (inductively increasing the separation distance in small increments), we extend it to any large distance, including 1,900 miles.
Step 4: Conclusion
By induction, the night sky remains nearly identical for observers as we increase their separation gradually, even up to 1,900 miles. This is because the stars are so far away that their apparent positions do not change significantly over such distances on Earth.
J/k, it’s totally different unless you are both on the same rotational plane.
math amazing!!
You had me on the first 95 %, not gonna lie.
I’m glad I didn’t read 100% of it then
If you lived 1900 miles West or East, you would see the same sky, just at different times. In this case, the difference in timezones would approximately be the difference in the sky you see. So if your husband is 3 hours ahead, he’d see the same sky about 3 hours before you.
If you lived 1900 miles north or south of each other, your horizon could be pretty different. But the stars directly overhead would be pretty similar.
If you lived on opposite sides of the equator, you might start to see different angles of the sky such that things directly overhead look flipped upside down. People in the southern hemesphere see the moon as upside down to people in the northern hemesphere.
This is a link that might help explain it: https://stellarium-web.org/
OP, you and your husband should download the Stellarium app. You can compare stars together when you talk. 🙂
thank you very much
You’re welcome. I really like looking at the night sky, hope the ap helps
yea me too!! the night sky here is very nice because the stars are soo bright and the moon is bright too, that’s the advantage of living in a calm city with not a lot of people!!
Our planet is spherical. No way N.Pole and S.Pole would have similar star pictures.
OP is talking about 1900 miles, which is some 3050 km or 27.5° across Earth. One can see more than 150° of the night sky in open areas so one will see over 80% of the stars the other does.
Yeah it’s 7000+ km from Florida to London, yet they both can see the Sun at the same time. You can’t see every star the same, but much of the sky will overlap.
No, they change out the sky backdrop every 1,000 miles or so
I got to go to the other side of the world once and was amazed at the night sky.