Comet Encounter

Comet Encounter: Comet of the Century re-aired Wednesday, December 25, 2013.

Comet Encounter
Follow a once-in-a-lifetime event — Comet ISON’s brush with the sun.
Full Program

Full Program

Watch as scientists around the world follow a once-in-a-lifetime event, the path of the sun-grazing comet ISON.


About the Program

Comets have fascinated, even terrified us for thousands of years. For scientists though, comets are a great opportunity. This year, 2013, a particularly massive chunk of ice and rock is coming our way, an object that will fascinate billions and should create the space show of the century.

Comet Hale-Bopp, 2007.Comet Hale-Bopp, 2007.
Right now Comet ISON, somewhere between one and 10 kilometers in diameter, is just beyond the orbit of Jupiter. As it races past us toward the sun it should develop a tail that will light up the skies brighter than a full moon. Then the comet will slingshot around the back of the sun and could emerge brighter than ever, treating the entire northern hemisphere to an unforgettable sight. In this program, scientists all over the world follow a once-in-a-lifetime event and shoot breathtaking images, spewing its essence into the void. But there is jeopardy too; the comet could evaporate completely or the sun's massive gravity could tear it apart. If the latter happens it will produce a so-called "string of pearls," several much smaller comets arching right across the night sky.


Comet Encounter was produced by Darlow Smithson Productions.


Related Links

Support for

Learn more about PBS sponsorship



Comet Encounter (DVD)

Follow scientists on the trail of the once-in-lifetime Comet ISON.

Buy It!

Your purchase supports PBS and helps make our programming possible.

When to watch

Comet Of The Century

Support your local PBS station
Sign Up for Program Reminders & More
Get the latest information about upcoming PBS programs, sneak peeks, tune-in reminders and web extras delivered to your inbox every week.