There are no charges over and above your membership dues which are billed quarterly. You may cancel at anytime. Upon registration, Community Members will be charged $1 to validate credit cards and Slooh Astronomers will be charged the introductory price of $19.95 for the first month of service. Thereafter, Slooh will bill your credit card for quarterly membership dues–$14.85 for Community Members and $74.85 for Slooh Astronomers.