User Group – Sidereus Academy Free Member Register with us by filling out the form below. Username* Choose a unique username for your account. This will be used to log in. Password* Create a strong password with at least 8 characters, including letters, numbers, and special characters.Confirm Password* EmailEnter a valid email address. We'll use this for account verification and communication. First NameEnter your given name. Last NameEnter your family name.