How to do the "black hole" skip

Take both lamps from on top of the fireplace in the first room

Put both lamps into your inventory in a way that one perfectly covers the other

Go to the library

Close inventory

Click on the star map to find the hidden black hole

Do the following things to it (make sure to click it and not the star map): Examine, Open, Close, Speak (leave string empty), Go

This glitch is easier to do in IIgs version since the stars and lamps are bigger pixels