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Year in History

Explore the major historical events, famous births, and notable deaths that occurred in the year 240. This year saw 1 significant event.

3rd Century240s

240 Timeline

  1. BC First recorded perihelion passage of Halley's Comet

    Halley's Comet is the only known short-period comet that is consistently visible to the naked eye from Earth, appearing every 72–80 years, though with the majority of recorded apparitions (25 of 30)…

Events

BC First recorded perihelion passage of Halley's Comet

Halley's Comet is the only known short-period comet that is consistently visible to the naked eye from Earth, appearing every 72–80 years, though with the majority of recorded apparitions (25 of 30)…

Frequently Asked Questions

What happened in 240?
In 240, there were 1 significant historical event. Notable events include BC First recorded perihelion passage of Halley's Comet.

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