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The hypothesis of Andreas Cellarius, showing the planetary motions in eccentric and epicyclical orbits.
The hypothesis of Andreas Cellarius, showing the planetary motions in eccentric and epicyclical orbits.
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The combustion of a match is an observable occurrence, or event, and therefore a phenomenon.
The combustion of a match is an observable occurrence, or event, and therefore a phenomenon.
A comparison between a candle flame on Earth (left) and in a microgravity environment, such as that found on the International Space Station (right).
A comparison between a candle flame on Earth (left) and in a microgravity environment, such as that found on the International Space Station (right). The same burning phenomenon is observed, but different flame shape and colouring phenomena are also observed.
Cloud chamber phenomena. Scientists use phenomena to refine some hypotheses and sometimes to disprove a theory. See also animated version.
Cloud chamber phenomena. Scientists use phenomena to refine some hypotheses and sometimes to disprove a theory. See also animated version.