counts down perihelions for periodic comets.

We show a live comet countdown timer under our banner that counts down to the next passing of a specific comet that you have chosen.

The countdown accurately counts down to the next perihelion (comets return) for a specific comet on the list.

You can choose a new comet to count down from the drop down box/list and the timer will automatically update the countdown and the "More information" link.

The "More information" link can be used to find more comet specific information for the comet you have selected.

Alternatively you can go to the Comet page which has a complete list of our archive or use the above menu to navigate to the comet category of your choosing.

If you are looking for something more specific use the search box.

We have an multiple independently sourced archive of comet information.