10th October

On this day in 1580 Tycho Brahe observed a comet and followed it until November 25. In January of the following year a pamphlet of warning was written by "Francis Shakelton, minister and preacher of the word of God":
A blazing star or burning beacon, seen the 10th of October last (and yet continuing) set on fire by God's providence, to call all sinners to earnest [and] speedy repentance.