Rockets are also used to launch communication satellites and scientific research missions.

On Windows, the IDLE icon has the double snake on a white page, while the python icon is the snakes on a dark console window.  They are already well differentiated.

However, the blue and yellow colors of the 16-bit version get darkened when placed in the top title bar of windows, and the snake shape a bit distorted. (idlelib/icons contains icons for both Windows and *nix.) They are even worse on Win10, so I have been thinking about redoing it. I might use your IDLE version to help with a redesign.

If you want the .exe icon changed, try to get support on python-list or python-ideas lists.