How can I pay for the use?

You can top up your account with points, with one Euro equivaling one point except for the higher tiers which offer some discounts (and thus, you end up with a little more than one point per Euro spent).

You can pay using your credit card directly on our site, or using PayPal:

Nowadays the transactions are live. However, please note that if you had a balance of zero, it will take a few minutes before the observatories will accept any Imaging Request you send.