Subscriptions update in progress - May 5th 2022

Subscriptions may once again be purchased, canceled, and reactivated as usual following resolution of the payment processor crisis.

We are still updating several of the relevant pages, so some links may return 404 errors.

Payment System Change

On November 23rd, 2021 we moved to a new on-site payment system.

If you were an Unauthorized subscriber before that date, you should make sure that you have canceled your subscription in the old system via the following link:

The old system is a completely separate site and your login for this site will not work there; you may use their password reset link if necessary.

As a general rule, duplicate charges caused by inattention to this notice will not be refunded.

For any questions or assistance, you may contact an admin:



Dive in Deeper

The Planetary Knowledge Core