What Is a Black Hole?
The Short Answer:
A black hole is an area of such immense gravity that nothing -- not even light -- can escape from it.
Build a Bubble-Powered Rocket! Build your own rocket using paper and fizzing tablets! Watch it lift off. How high does your rocket go? Print this page for the instructions. Suggestion: Find a grown-up to do this activity with you. Materials: Paper, regular 8-1/2- by 11-inch paper, such as computer printer paper or even notebook paper. Plastic 35-mm film canister (see hints below) Cellophane tape Scissors Effervescing (fizzing) antacid tablet (the kind used to settle an upset stomach) Paper towels Water Eye protection (like eye glasses, sun glasses, or safety glasses) Hints: The film canister MUST be one with a cap that fits INSIDE the rim instead of over the outside of the rim. Sometimes photography shops have extras of these and will be happy to donate some for such a worthy cause. Keep in mind: Just like with real rockets, the less your rocket weighs and the less air resistance (drag) it has, the higher it will go. Making the Rocket You must first decide how to cut your paper. You
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