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Chinese astronaut lights candle with match on Tiangong space station to demonstrate flame behaviour

Chinese astronaut conduct a spherical flame experiment during an orbit to ground space lecture using a match and a candle.
C&EN

Flame Out

1. Ask the adult you are working with to light the candle. 2. Watch the candle flame start out small and get bigger. Notice how some of the wax near the wick melts. 3. As the flame burns, the wax from ...