IRG 2021 Registration Registration for the 7th Interstellar Symposium in Tucson, Arizona, September 25-27, is open! Go to our registration page to sign up for the symposium and any pre-symposium seminars you’d like to attend. Don’t forget to let us know if you’ll be attending the opening reception, the awards banquet, or any of our working tracks (no extra charge for these, we just need a good head count). Be sure to notice the reduced rate for any companions who will only be attending meals and social events and not the presentations themselves. We look forward to seeing you there! Don’t forget to reserve your room at the Tucson Marriott University Park using our room block discount!