This is John Batchel, a conversation with my good colleague, Bob Zimmerman, about the

Andromeda Galaxy, a beautiful spiral galaxy heading right for us, we're told.

Collision between the Andromeda Galaxy and the Milky Way Galaxy, leading to unknowns.

However, there's been new calculation.

Bob gives us confidence that the probabilities

are more in our favor that it will not happen. Here's Bob Zimmerman to explain. No collision

maybe. In 10 billion years. Time to worry? Well, not yet. More of this tonight.

This is all an example of the uncertainty of science.

Back in 2012, some scientists made a prediction using computer models that the Andromeda galaxy,

which is the biggest nearby galaxy, was going to collide with the Milky Way in 5 billion years.

I should point out, John, that it would really do

no harm to us, even if it happened now, because the stars just simply interweave between each other.

There's too much space. I know, but I was trying to sell the story to Hollywood. Yeah, I know,

I know. I know. Everyone does that. Well, anyway, that was the prediction in 2012. It was

always extremely uncertain.

No one in the science community took it too deeply, but there's now been a new study

that's done more calculations looking into the interactions of all the galaxies and small

galaxies that surround the Milky Way.

And it's changed the prediction.

It thinks that there's only a 50-50

chance that the two will collide in fact and it and this is over the next 10 billion years