Two planets X and Y. I know their masses and distance. Possible to find velocity and displacement?

Okay, heres the easier-to-read version:Lets say I have these two planets, X and Y. I know each of their masses and the distance between them. I can us

Okay, here's the easier-to-read version:

Let's say I have these two planets, X and Y. I know each of their masses and the distance between them. I can use that to find the gravitational force between them, right? But can I use the gravitational force to find the distance and the velocity at which they move towards each other? What about how long they will be in motion before colliding? They will accelerate towards each other, right?

I know I've got a lot of questions. Any help is appreciated! :)

or:Okay, here's the easier-to-read version:Let's say I have these two planets, X and Y. I know each of their masses and the distance between them. I can use that to find the gravitational force between them, right? But can I use the gravitational force to find the distance and the velocity at which they move towards each other? What about how long they will be in motion before colliding? They will accelerate towards each other, right?I know I've got a lot of questions. Any help is appreciated! :)

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