Why do we find galaxies colliding if the universe originated from a single point, and the outer regions are...

Question

expanding faster than the inner regions.

Thankyou!

Answer 1

There are no "outer regions" or "inner regions," because the Big Bang was not an explosion. The galaxies are NOT streaming through space, all flying away from a central point. That's not what the universe looks like.

There are no "outer regions" or "inner regions;" everywhere in the universe looks pretty much the same: more or less uniformly filled with galaxies everywhere. The expansion of the universe means that distances are getting larger between galaxies because space itself is expanding between them, and NOT because they are flying through space themselves.

For galaxies that are near each other, the universal expansion is negligible, and their mutual gravity causes them to interact. Galaxy collisions are quite common throughout the universe.

Answer 2

that is using the fact the universe isn't homogeneous. If it have been, stars might have in no way formed interior the 1st place, because of the fact the universe might consist completely of an precisely spaced matrix of atoms increasing uniformly in 3 dimensions. something befell interior the 1st couple milliseconds of the upward push to introduce slightly chaos into the upward push and this went directly to type denser and much less dense areas which in turn formed stars and galaxies. This then created an uneven development to the commonly used gravitational field and stars or perhaps galaxies must be sped up in the direction of one yet another yet no longer collide because of the fact of a slingshot result. Andromeda curiously shot around yet another galaxy which replaced its speed and heading and set it on a collision course with the milky way galaxy. FYI: galaxies probably collide fairly many times yet curiously few, if any of the celebs easily collide. that is using the fact maximum individuals of a galaxy is thoroughly empty area. What collides are 2 super garvitational fields which then paintings at the same time to alter the form of each galaxy. I doubt the two galaxy will stay disk formed after the collision.

Answer 3

Galaxies occur in gravitationally interacting groups. Within these groups, the gravitational force between galaxies is much more significant than the expansion of space. Expansion only becomes the dominant dynamic over very large distances - like hundreds of millions of light years.

You can't really say that the outer regions are expanding faster. The expansion of space appears to be the same everywhere, it's just that its cumulative effect becomes more obvious as distance increases. If you were in one of those galaxies near the "edge" of the universe, you might think the Milky Way was in the "outer regions".

Answer 4

Given any explosion, parts on the fringe will move away from the central spray of debris. The parts on the left move away to the left. The parts on the right move away to the right. The parts of the debris in the center move away from the origination point - outward.

So the fringe elements of debris are moving away from the central spray of debris at a rapid rate - which is what we see today.

Some of the acceleration of velocity has yet to be explained, however. Theories exist which suggest some influence from black holes provides the extra boost in the velocity we see.
Since we canot "see" black holes, that might indeed be the cause of the added speed.

Stars are being born, going through their death cycles, and exploding with tremendous energy all the time. These activities produce movement of objects totally unrelated to the original big bang forces. Over time, those various debris objects collect other debris and become larger with more mass. Interestingly, the more mass that an object has, the more powerful its gravity attraction becomes and more nearby debris is collected as a result. Soon, what was once a rocky chunk of debris becomes a huge hurtling asteroid moving through space on a trajectory of its own, unrelated to the big bang.

Answer 5

Most galactic collisions and mergers occured at an earlier time of the universe, when things were closer together.

And even though everything is moving apart, there is still random motion of galaxies and stars within that larger motion.
Some galaxies are gravitationally connected and are not expanding from each other (such as the galaxies in our Local Group) and their mutual gravitation and motion can cause collisions and mergers.

Answer 6

yes. objects clumped together during the expansion of the universe because of gravity. also gravity can change and objects trajectory leading it sideways into the wave of expansion, colliding with or eating other forms of matter.

spirals are a common theme caused by gravitational pull, like our solar system.

Answer 7

gravity