Timeline September 1644

2nd Millennium › 17th Century › 1640s › 1644 › September 1644

September 1644

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Person

Event

Conflicts

Disaster / crisis

Science

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Dashed left edge = started before September 1644 · Dashed right edge = ongoing beyond September 1644

Events in September 1644 1

1644 – 1710 Ole Rømer Measurer of Light The astronomer who first demonstrated that light travels at a finite, determinable speed.