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Source/Further reading:

History, overview: https://www.history.com/news/a-brief-history-of-halleys-comet-sightings 

NASA, 1P/Halley in-depth: https://solarsystem.nasa.gov/asteroids-comets-and-meteors/comets/1p-halley/in-depth/ 

UK Space Center: https://spacecentre.co.uk/blog-post/halleys-comet-shaped-history/ 

Britannica: https://www.britannica.com/topic/Halleys-Comet 

In Our Time podcast on comets (with some details on Halleys): https://www.bbc.co.uk/programmes/b01pw38n 

io9 - Halley’s comet through history: https://io9.gizmodo.com/how-halleys-comet-sightings-changed-history-over-the-pa-5637815 

Halley’s influence on early-modern astronomy: https://doi.org/10.1093/ref:odnb/92735 

Edmond Halley, in-depth biography: https://doi.org/10.1093/ref:odnb/12011 

Scientific American: https://www.scientificamerican.com/article/in-the-path-of-halleys-comet-humanity-might-find-its-way-forward1/ 

Comet Panic of 1910: https://astronomy.com/news/2020/10/halleys-comet-covid-19-and-the-history-of-miracle-anti-comet-remedies  

Modern comet list (constantly updating): https://physics.ucf.edu/~yfernandez/cometlist.html#hf