[woofer2425]

Considering that once an object in space moves in one direction it continues on that course and speed unless some other force causes the object to change direction or speed.

If there is an explosion in space (ie Big Bang) and debris is going in all directions at once, all in a straight line away from the center of the explosion. How can bits of matter, that are moving away from each other at a very high rate of speed, come together and form planets and other large bodies?

[Junior]

If there is an explosion in space (ie Big Bang) and debris is going in all directions at once, all in a straight line away from the center of the explosion. How can bits of matter, that are moving away from each other at a very high rate of speed, come together and form planets and other large bodies?

The Big Bang was not an explosion. It was a rapid expansion of space-time.