What will be the result??

Some time in the future, two billion years or so, Our Milky Way Galaxy
and the nearby Andromeda Galaxy are supposed to collide. As there is
supposed to be a Black Hole at the center of our galaxy (I don't know if
there is also one at the center of the Andromeda Galaxy or not!!), what
effect will this have on our Black Hole??

Will it grow bigger and bigger, as it consumes more and more of the
Andromeda Galaxy??

--
Daniel

On 10/27/2018 2:34 AM, Daniel60 wrote:
Some time in the future, two billion years or so, Our Milky Way Galaxy
and the nearby Andromeda Galaxy are supposed to collide.

Which brings up my question:
from
https://www.spaceanswers.com/deep-sp...romeda-galaxy/

If the universe is expanding, why are we on a collision course with the
Andromeda galaxy?
by Jonathan O'Callaghan, 26 January 2013
Gemma Lavender heads straight into this one to find us the answer.


The expansion of the Universe, as measurements carried out by astronomer
Edwin Hubble in the 1920s show, mean that galaxies are rushing away from
us at a rate, recently measured by today’s cosmologists, to be 74
kilometres per second per megaparsec (where one megaparsec equals around
3.26 million light years).

While it is easy to envision all galaxies moving away from each other,
the evidence of smash-ups between these gigantic structures litter the
Universe. This means that galaxies are both moving away and crashing
into one another – this happens much more often than you think.

So often, in fact, that our galactic neighbour, Andromeda is moving
towards the Milky Way Galaxy at around 250,000 miles per hour – a speed
that would get you to the Moon in about an hour.

Why this is so is all thanks to the gravity of the dark matter
surrounding the pair, knitting them together so tightly, that they
resist the expansion of the Universe and are instead, drawn together
with Andromeda falling towards us. As you may have read in our feature
on the Andromeda Galaxy in issue 6 of All About Space, we are unlikely
to see the spectacular collision as our Sun evolves and extinguishes
life on our planet’s surface.

However, when the inevitable does happen, and the two coalesce, they
will create a single elliptical galaxy with the merger triggering a
great burst of star formation and the supermassive black holes that sit
at the hearts of both galaxies will combine. While stars in both the
Milky Way and Andromeda are unlikely to collide due to their great
distances, the gravitational disturbance could cause what is left of our
Solar System to change its position – tossing it from its current
position in the Orion spur and further from the Milky Way’s core.

The galaxy merging does not end there either; Andromeda’s companion, the
Triangulum Galaxy – which is also attached by dark matter to the pair –
will join the collision, taking another two billion years to merge with
“Milkomeda� completely.

Tags: Andromeda galaxy, collision, hubble, milky way, universe expansion

It is very important to note, that the
Milky Way - Andromeda thing is really only a merger.

There will be no actual colliding of anything !

Typical spacing between stars is like two baseballs, one in NYC and
the other in Chicago. Way too much space for any collisions.

A lot of local galaxies seem to be very slowly seperating,
but not these two.

Le 27/10/2018 Ã* 11:34, Daniel60 a écritÂ*:
Some time in the future, two billion years or so, Our Milky Way Galaxy
and the nearby Andromeda Galaxy are supposed to collide. As there is
supposed to be a Black Hole at the center of our galaxy (I don't know if
there is also one at the center of the Andromeda Galaxy or not!!), what
effect will this have on our Black Hole??

Will it grow bigger and bigger, as it consumes more and more of the
Andromeda Galaxy??


Nothing for both black holes
unlikely that both black holes will collide

but both galaxies totally differently configured

https://www.youtube.com/watch?v=W-csPZKAQc8

a425couple wrote on 28/10/2018 1:57 AM:
On 10/27/2018 2:34 AM, Daniel60 wrote:
Some time in the future, two billion years or so, Our Milky Way Galaxy
and the nearby Andromeda Galaxy are supposed to collide.

Which brings up my question:
from
https://www.spaceanswers.com/deep-sp...romeda-galaxy/

Snip

Thanks for that. Answers my question well!

--
Daniel

Actually, my example would be of very close stars.

If they were 10 LY apart, then that would be
like baseballs about 5,000 miles apart !

On 10/27/2018 1:55 PM, wrote:
It is very important to note, that the
Milky Way - Andromeda thing is really only a merger.

There will be no actual colliding of anything !

Typical spacing between stars is like two baseballs, one in NYC and
the other in Chicago. Way too much space for any collisions.

Yes.
This quote was in my post, "While stars in both the Milky Way
and Andromeda are unlikely to collide due to their great distances"

And, perhaps, the word "intermixing" would be even better than
"merger", and better than "colliding". ?

Intermixing is OK.

They'll be gravitational interactions, etc.

On Saturday, October 27, 2018 at 7:57:57 AM UTC-7, a425couple wrote:
On 10/27/2018 2:34 AM, Daniel60 wrote:
Some time in the future, two billion years or so, Our Milky Way Galaxy
and the nearby Andromeda Galaxy are supposed to collide.

Which brings up my question:
from
https://www.spaceanswers.com/deep-sp...romeda-galaxy/

If the universe is expanding, why are we on a collision course with the
Andromeda galaxy?
by Jonathan O'Callaghan, 26 January 2013
Gemma Lavender heads straight into this one to find us the answer.


The expansion of the Universe, as measurements carried out by astronomer
Edwin Hubble in the 1920s show, mean that galaxies are rushing away from
us at a rate, recently measured by today’s cosmologists, to be 74
kilometres per second per megaparsec (where one megaparsec equals around
3.26 million light years).

While it is easy to envision all galaxies moving away from each other,
the evidence of smash-ups between these gigantic structures litter the
Universe. This means that galaxies are both moving away and crashing
into one another – this happens much more often than you think.

So often, in fact, that our galactic neighbour, Andromeda is moving
towards the Milky Way Galaxy at around 250,000 miles per hour – a speed
that would get you to the Moon in about an hour.

Why this is so is all thanks to the gravity of the dark matter
surrounding the pair, knitting them together so tightly, that they
resist the expansion of the Universe and are instead, drawn together
with Andromeda falling towards us. As you may have read in our feature
on the Andromeda Galaxy in issue 6 of All About Space, we are unlikely
to see the spectacular collision as our Sun evolves and extinguishes
life on our planet’s surface.

However, when the inevitable does happen, and the two coalesce, they
will create a single elliptical galaxy with the merger triggering a
great burst of star formation and the supermassive black holes that sit
at the hearts of both galaxies will combine. While stars in both the
Milky Way and Andromeda are unlikely to collide due to their great
distances, the gravitational disturbance could cause what is left of our
Solar System to change its position – tossing it from its current
position in the Orion spur and further from the Milky Way’s core.

The galaxy merging does not end there either; Andromeda’s companion, the
Triangulum Galaxy – which is also attached by dark matter to the pair –
will join the collision, taking another two billion years to merge with
“Milkomeda� completely.

Tags: Andromeda galaxy, collision, hubble, milky way, universe expansion

It will be round.It will have a twin BH,and they will revolve around in orbit.One twice as big.In this space time its very rare since all galaxies are moving apart. From far away it will be redder due to its added gravity.Bert

It is very important to note, that the
Milky Way - Andromeda thing is really only a merger.

There will be no actual colliding of anything !

Typical spacing between stars is like two baseballs, one in NYC and
the other in Chicago. Way too much space for any collisions.

A lot of local galaxies seem to be very slowly seperating,
but not these two.