Invitation Letters from the National Space Society
In order to attend the ISDC as a visitor from another country, you may need to obtain an invitation letter from the NSS. (If you will require a visa to enter the U.S., you must have this letter.) For general ISDC attendees, please request your invitation letter using the Adult Invite Form. If you are attending in connection with an NSS space contest, such as the Gerard K. O’Neill Space Settlement Contest or the “Live in a Healthy Space” Design Competition, please use the Contest Invite Form.
