Give yourself a reader-name, so that Planetarium can identify you when you visit. Make sure you remember it (the name is not case sensitive).

Choose a password made up of numbers and letters that is not easy to guess, but that you won't forget (the password is case sensitive). Keep your password secret. We do not re-issue forgotten passwords — if you forget yours, you'll have to go right back to the start.

Planetarium can automatically remind you by email if you forget to log in for over a week, so you don't miss any instalments. We don't mind if you leave your email address blank, but of course if you do that you won't be sent a reminder — but if you have an RSS reader you don't need email reminders anyway. Afterwards, your email is deleted. See the FAQ about email to be reassured.

After you've registered, if you let a few weeks elapse without logging in, your reader-name will expire. Just make sure you visit every week, and you won't have to worry about this. You will be granted access to a new instalment of Planetarium every seven days, starting from registration (give or take a few hours).

There is a lot more information in the extensive Planetarium Frequently Asked Questions.