Open Thread

Daytime Comet

Join Slate’s open thread for the week of November 14.

On this day in 1680, Gottfried Kirch discovered a comet, through use of a telescope. Known as Kirch’s Comet or the Great Comet of 1680, it would grow in brightness to a maximum reached in late December, and was reportedly so bright at that time it was visible in daylight. The comet also played a role in the work of Sir Isaac Newton, who used it to test and verify Kepler’s laws of planetary motion.

You may use this page to discuss comets and other astral bodies, or engage in other freewheeling, off-topic discourse. Find previous discussions in the Open Thread archive. Excepting the entreaty that you remain on topic, all of Slate’s usual commenting policies apply.

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