Question about zooming

Just wondering why when you are zooming in, at some point it stops working and every object disappears and you have to re-center the view to continue?

In a parallel projection viewport (top, Front, Right, etc.), wheel zooming pushes the viewport target ahead of the camera. In a Perspective projection, the camera moves to the target so you can run out of room.
You can do a “dolly zoom” in a perspective projection viewport by holding the Alt key while wheel zooming. This pushes the view frustum target along with the camera so you don’t run out of zoom room.
However, you can Zoom right on through the object to the other side.