[blowfish]

Following this logic:

Modern Geology isn't valid science, since I can't assemble a back-arc basin in my lab.

Modern Astronomy isn't a science, since I can't create a star in the lab.

[Fester Chugabrew]

Yes. Let's follow that logic:

Modern Geology isn't valid science, since I can't assemble a back-arc basin in my lab.

Modern Astronomy isn't a science, since I can't create a star in the lab.

Intelligent Design isn't a science because I cannot assemble a simple cell.

[JamesP81]

Modern Astronomy isn't a science, since I can't create a star in the lab

A star is nothing more than a large fusion reaction, and mankind has created such reactions. They are called hydrogen bombs.