Red shift due to speed - also a doppler effect/shift:
I get some of what you are talking about, but what about mapping a trip?
We can map our trip to the moon and sun (assuming we do not burn up). However, a trip to Alpha Centauri would be trickier. It would have moved in 4.4 light years. At the rate we are traveling, then we would have to have a computer powerful enough to make the necessary adjustments so that we would reach where the galaxy would be in 4.4 light years. If we cannot accurately calculate where it will be, then we could miss it completely. Thus, one needs to be able to plot the speed,direction, pull of gravity, time dilation, red shift, etc. in where Alpha Centauri is heading and we would have to plot some trajectory course in order to meet it 4.4 light years from now. If we can't map our trip, then it's moot. At some point, we won't be able to do it. So 25,000 light years would be impossible. Maybe 4.4 light years is impossible at 40% the speed of light. Thus, what we are seeing 4.4 light years away or anything we are seeing is misleading. Misleading may not be the proper scientific term, but it's not a straight line to 4.4. light years away as the graph shows. Space and time will be distorted so it would require some special kind of mapping. Traveling at even 20 - 40% the speed of light would change our trajectory. Maybe it is better to picture it as traveling as:
Scottie would have to have the computer calculate the proper coordinates for Captain Jim Kirk to arrive somewhere in Alpha Centauri accurately.
Another could be traveling at warp speed win a space ship and that would require something else which we do not know of yet.
Basically, if we can't map how far something is taking into account the various factors involved, then these light years distances are not correct.
Not to mention time! A quasar whose red shift indicates is 13 billion light years from earth also is plotting where it was 13 billion years ago - it may not even exist now - or may exist in a different form - e.g. a galaxy.
You bring up a good point - how do we date the upcoming merger of Milky Way with Andromeda?
We Finally Know When Our Milky Way Will Crash Into the Andromeda Galaxy
The Milky Way will survive in its current form a bit longer than astronomers had thought, a new study suggests.www.space.com
"The monster collision between our Milky Way and fellow spiral galaxy Andromeda will occur about 4.5 billion years from now, according to the new research, which is based on observations made by Europe's Gaia spacecraft....
The team's models give a later-than-expected date for the Andromeda-Milky Way smashup and also suggest that it will be more of a sideswipe than a head-on collision. (Because the distances between stars are so great, the odds that our own solar system will be disrupted by the merger are very low. But the crash will definitely liven up the night sky for any creatures that are around on Earth 4.5 billion years from now.)....
By the way, Andromeda won't be the next galaxy our Milky Way slams into: The Large Magellanic Cloud and Milky Way will merge about 2.5 billion years from now, a recent study suggested."
Compare Hebrews 1:10-12 - especially the Greek word for "changed" (ἀλλαγήσονται/allagesontai/allaso/change/transform/make different).
And the word for "wrap up" - ἑλίξεις/elizeis/hilisso/roll up/to coil.
The context therefore means to "perish" as to its present form - Milky Way will be changed/transformed when it "wraps up" with other galaxies and thus will perish as to its present form - not literally go out of existence.
Another example of the gawds “finely tuned” universe.
Rabbi Mordechai Steinman
seems to think so.
The Fine Tuning of the Universe - Aish.com
An amazing array of scientists are bewildered by the design of the universe and admit a possibility of a designer.www.aish.com
.In fact, this "fine-tuning" is so pronounced, and the "coincidences" are so numerous, many scientists have come to espouse The Anthropic Principle, which contends that the universe was brought into existence intentionally for the sake of producing mankind.
for what purpose "intentionally for the sake of producing mankind" - seems quite an absurd notion when there is absolutely nothing mankind will ever accomplish on a universal scale ... as well as dishonest to place mankind above other living beings. -
being drunk on their own forgeries is more like it.
You will have to ask the good rabbi.