I have a suggestion for Technocraft conducted every year.
As we know every year we conduct mobile planetarium during annual Technical fest in college.
Why not make our own dome this time ?
As we know the dome we currently use is costly and works on air.
We can make a fold-able dome made of card board.
Please find link below showing all the details.
We need to work on making dome other things needed are to be purchased from market.
We need to buy only Half Dome mirror to project in the dome.