For fans of Neal Stephenson’s incredible new novel Seveneves, you may find it useful to know how to build a comet. Ars Technica obliges: Comets have always been objects of fascination. Even in…

In last month’s article I discussed some of the many close encounters between Earth and celestial objects that had occurred in recent decades. This came on the heels of a series of…

Allison McCann reports for Popular Mechanics on the visual trail of a comet as it approached the sun, vaporized, and finally disintegrated: Sun-grazing comets are frustratingly elusive. As they approach the intense…

What a great article from Alasdair Wilkins on Truly insightful. Alasdair Wilkins writes:
Halley's Comet

Ancient Greek texts reveal the earliest recorded sighting of the solar system’s most famous comet 2,500 years ago.

Since then, Halley’s Comet has repeatedly cameoed in history, getting credit for toppling armies, birthing empires, and even killing Mark Twain.

Halley’s Comet is the most famous of the short-period comets, which are comets that complete their eccentric orbits in 200 years or less.

It’s the only short-period comet that’s visible to the naked eye, and its 76-year circuit means it’s the one comet that pretty much everyone can hope to see once, if not twice, during their lifetime. Because of this uniqueness and its often dazzling appearances, it’s become something of humanity’s companion throughout human history, popping up again and again in historical records.