lets hope one doesn't head our way. we might not live to see it but our kids and or grand kids will. and that will be the end of earth and its species.

so, in other words: the star was travelling at ~0.4% the speed of light. that's amazing

where is the star heading to?

Steady on, Rick. Most unlikely our known descendents will be effected: and anyway, we have an appointment with Andromeda already, so we are all doomed, anyway.
I stand ready to blame everything nasty on global warming, anyway. That comes first - unless all the "climate scientists" are wrong, which is most likely.

Thank God its going the other way......

Why do you falsely assume that our collision with the Andromed galaxy will doom us all? The cosmic mingling will only change the position of the solar system. It is not a game of billiards on a grand scale as you are tempted to think. The vast distances between stars will mean little will actually collide except for the highest concentrations of star clusters.
Not only that, you also insert your amateur opinion on that climate science is most likely wrong. Leave it to the professionals doing actual science to tell you what is right, i.e. NASA, etc. You want to know what greenhouse gasses or a lack of it can do a to a planet? At one extreme end, you have Venus, a smoldering place. At the other end, Mars, a frigid place.

Good post, Freddy. And Martin, where did you get the info about the direction the star is heading? Anyway, hearing something new is one of the most exciting science--especially in astronomy.

I just have to ask how big is an "enormous white dwarf?" If it is a "dwarf star, can it be enormous? Either the classification of the star is wrong or someone needs to do better proof reading.

I agree with the concept of Andromeda collision not being like a billard game, but have to really wonder what all could happen. It would be an interesting concept for a programmer to use in making a simulation. But I doubt it could be done for lack of knowledge of what the galaxies contain.
As to the Global warming - google "Game Over - IPCC Quietlly admits defeat." It is a done deal - its been a faslehood from the start with a political goal of promoting globalism.
The IPCC is the UN's go to source for scientific data concerning AGW And the IPCC data for the last 15 years was compiled and proves there AGW has only happened in the minds of politicians and others who stand to make money from it. In fact the UN acknowledged there has been no AGW for at least the last 15 years, but this does not hit the headlines in any paper.

One thing that needs to be stated, in the astronomical sense 746MPS ISN'T very fast. It's a false sense of speed based on a human perspective. Our own solar system is traveling 143MPS around the milkway. This is like someone running a 4 minute mile being passed by a car doing 60mph. NOT that amazing.