New Meteor Shower!
The May Camelopardalids are a never-before-seen meteor shower gracing the skies around midnight the night of May 23/24. Some predictions call for meteor rates surpassing 100 an hour! Don't miss this celestial firework show!

Download a free copy of Don's book, A Decade of Comets.
(24.5 MB Word document)

Download Don's comet hunting spreadsheet.
(32k Excel document)

Photo of Don at his telescope

Welcome to

A website devoted to the discoveries of world-renowned comet hunter, Don Machholz. Find out how Don found each of his comets, view a dizzying array of cometary photographs, and find info on upcoming astro events with Don himself.

Read Don's First-hand Accounts of His Comet Discoveries!

With eleven comets under his belt (so far), Don has discovered more comets than nearly anyone else on the planet. Take a look behind the scenes as Don recounts his moments of discovery on the Comet Discoveries page and share in the thrill of the hunt!