What is the probability of star collision in a colliding galaxy?

What is the probability of one star colliding with another in a galaxy collision?





Let's say our galaxy collided with Andromeda?





Is it pretty close to zero?|||That is correct, very close to zero. From all the models that folks have run, the chances for an actual collision is very low. That isn't to say that other gravitational effects won't be common though.|||Maybe one or two will crash into each other. The distance between stars is very Large to have a close encounter like that.


There will be a greater chance of forming Binary star instead of collision since speed at which merging of Galaxies occur are very slow compared to time taken achieve this.


Probability of collision almost close to zero.|||Yep. A direct hit would be unexpected. But there would be considerable scattering of stars from near misses, and a lot of the scatterees would get twisted out of the galaxy's plane. I'm wondering whether this isn't how elliptical galaxies form: a collision between two spiral galaxies.





If two stars had an off-center collision, the cores of each would keep going, trailing hot, luminous gas, with their outer layers stripped. There'd probably be a lot of flash fusion (shock fusion) in the outer layers though.





If two stars had a head-on collision, there would be about one second in which the resulting explosion reached an absolute magnitude of 鈭?6 (or brighter) from transformed kinetic energy and flash fusion.|||Practically zero. Despite the huge amounts of stars in a galaxy, the distribution of stars in a region is actually very sparse, with a few light years between stars at least (except in multiple star systems, of course). With stars not being nearly as large, the chances of actual collisions are very small.|||Very small. A galaxy is like this: if you have a pickup truck full of sand, the number of sand grains is approximately equal to the number of stars in a galaxy. To make an accurate scale model of a galaxy, you would take that 2 cubic meters of sand, and distribute it over a volume equal to that of the Earth. Now, imagine two such objects colliding.|||Very very low probability, but sometimes binary star systems do collide. Our hunger for knowledge as humans makes us over confident in our abilities to grasp the understanding of the universe. We as a species have not, nor cannot leave our own solar neighborhood, yet we are so certain of the "facts' The 'fact' is yes although based on sound science, many times we as people have no clue what's out there and how it actually works. Remember it wasn't too long ago we thought earth was flat, and we were the center of the universe. If the universe is as big as we say it is, then in terms of "universal knowledge" we know nothing|||Happening right now.





Seen a picture in National Geographic of two spiraling galaxies cutting through each other like the blades of two circular saws. In the center where the two galaxies meet or collide is a big nebulous reddish-pink gas cloud.





According to the caption there are thousands of light years of clearance between the stars and the two galaxies will pass through one-another without any stars or planets colliding.





Amazing huh?|||1 out of 1.





On December 21st 2012 them stars and planets are going start bouncing and rattling off each other like a break shot on a pool table.|||I think the real danger is from New Star formation due to compression of the interstellar hydrogen.