Paul Sutter is an astrophysicist at The Ohio State University and the chief scientist at COSI Science Center. Sutter is also host of Ask a Spaceman, RealSpace, and COSI Science Now. Sutter contributed this article to Space.com's Expert Voices: Op-Ed & Insights.

https://www.space.com/36990-what-happens-when-galaxies-collide.html

So when galaxies collide there are several things that might happen. There is a very good chance that the Earth will be destroyed. It might be merged with another planet or star. It might escape unscathed, but without an orbit around a star. Out Sun might be destroyed.

All in all, not a very promising prospect.

On this I have a different idea of what will happen based on the reality of things that have already been observed happening.

The Andromeda Galaxy, Messier 31, M31, or NGC 224, is a spiral galaxy approximately 780 kiloparsecs (2.5 million light-years) from Earth, and the nearest major galaxy to the Milky Way. Its name stems from the area of the sky in which it appears, the constellation of Andromeda.
Andromeda is actually a barred spiral galaxy, like the Milky Way.
It has been proposed that the observed double nucleus could be explained if P1 is the projection of a disk of stars in an eccentric orbit around the central black hole. ~ wiki

Our Galaxy is also a barred spiral galaxy with a single super-massive black hole at its center called Sagittarius A. Our galaxy is spinning too.

The Earth has a magnetosphere resulting from its spin conditions. The magnetosphere deflects cosmic rays and solar coronal ejections from out parent star, the Sun.

The Sun also has what is called a heliosheath that deflects interstellar debris and the interstellar winds, protecting the planets within.

The Galaxy is also spinning. It has a shield protecting it from inter-galactic winds and debris. Likewise, Andromeda galaxy is spinning and has an inter-galactic shield of protection around it.

All these forces deflect.

When Andromeda reaches the Milky Way, in approximately 3.75 billion years, its not going to hit us with force of a freight train. It will slowly touch our galaxy, which is in motion as well. The force barriers will collide and merge. If the black holes at the centers miss one another, a gravity dance will happen as the black holes are absorbed into one single black hole. This process will take billions of years. As it happens, rotational motion of the galaxies will be changed.
Star proximity will change and some may collide while others deflect.
Again, all this occurs over billions of years.

Sol (the Sun) is approximately 4.8 Billion years into its expected 10-12 billion year life cycle. It is currently in the initial stages of main sequence so its still getting hotter and brighter. In 3.75 billion years, when Andromeda arrives our Sun will be around 8 Billion years old, in the diminishing stages of main sequence. It will have already bathed the Earth in deadly radiation extinguishing all life on our lil planet.
Since the merge of the black holes at the centers of the galaxies will take billions of years to happen, Sol will likely be a white dwarf before anything comes in contact with is area of influence and by then, earth will already have been swallowed by its red giant stage.

What will likely happen to Sol is it will be captured by a star more massive and become its satellite.

Kinda like trying to catch a quarter with tweezers while underwater.

There are things that could occur that could completely destroy the Earth in the near future while we still inhabit the planet.

One such thing could be a relatively close proximity passing of a neutron star fragment (the total mass in a teaspoon is somewhere on the order of 10 billion tons) that sets up a gravitational change in the solar system that results in something of great mass colliding with the Earth or changing the Earth's orbit to send it into the Sun.
Not likely, but it could happen.

Any crack in the mantle might cause a catastrophic release of pressure in the Earth's outer core causing the crack to widen, possibly breaking the planet in half or jet powering it into a collision with a moon, planet or even the Sun.
Again, not likely, but it could happen.

There are more things that could happen to kill all life on the planet than the destruction of the planet itself.

One super-powerful coronal mass ejection could over-power the magnetosphere and burn the planet to cinders. The Earth is slowing its spin. Not noticeably but it is slowing. As it slows, the dynamic process that creates the magnetosphere is also slowing. Making it weaker over time. I think this is what happened to Mars.
But, its not going to happen all at once and the effects won't be a one fell swoop event.

Perhaps it's time to return to the topic of this thread. It is really about the term "eon." Not the destruction of the Earth.

The Bible does not tell us the Earth will be destroyed.

Why would God create a new Earth if this one isn't destroyed?

Eon ~
1. an indefinite and very long period of time, often a period exaggerated for humorous or rhetorical effect.
2. a unit of time equal to a billion years.
3. a major division of geological time, subdivided into eras.

Doesn't the Bible say the Earth is 6,000 years old?
That is a long way from an eon?

Nothing you say makes any sense without Biblical back-up.


Strong's

H5769 `owlam o-lawm'
or lolam {o-lawm'};

from H5956; properly, concealed, i.e. the vanishing point; generally, time out of mind (past or future), i.e. (practically) eternity; frequentatively, adverbial (especially with prepositional prefix) always. Compare H5331, H5703.

Strong's

G165 aion ahee-ohn'
from the same as G104;

properly, an age; by extension, perpetuity (also past); by implication, the world; specially (Jewish) a Messianic period (present or future). Compare G5550.

An eon, as used in the Bible, is an undetermined time span. The Messianic Period, aka the Millennium, is defined as 1000 years (Rev. 20:4).



Not a Scriptural concept.

It wouldn't make sense to you no matter what Scripture I used because you reject The Word of God.

You make alot of assumptions.

Just because the earth will be destroyed someday doesn't mean the billions of other civilizations in the universe will be.
There are billions of galaxies with more stars and planets than all the grains of sand on all the beaches on earth. Think about that one.

This present Earth will be destroyed one day, but a New Earth will come .

Do you have any evidence of these billions of other civilizations you speak of?

Did you know God has named for every single star He has created?

Actually I do not.
You reject the deity of Jesus Christ.
One of several things that you reject regarding plain and simple Scripture.

Could you provide a link to this plain and simple Scripture.Thank you.

Now that makes no sense at all

Has a name for every star He created.

Can you make sense out of that?

I mean surely you can. After all you talk about billions of civilizations .

Please.

What about that evidence of those billions of civilizations?

Did you forget that question?

I'm done.

Actually, you do.

Where is the evidence of this "deity of Jesus Christ" in the Scriptures?

There may very well be billions of other civilizations in the universe. But our Bible deals with the Earth and mankind.

Actually I do not.

Why do you keep requesting the obvious?
You went to Moody after all, so you should know.