I'm not sure when or where you can tickets, but I would follow the advice given by Tellus 360 or Trevor up above.
Hi Steven, We do sell tickets at our front bar during operating hours. You can also find all of our ticket links here: https://tellus360.ticketfly.com/calendar/
I believe you can buy them online at anytime. Otherwise I believe you can buy tickets from Tellus during their normal business hours.
Thanks! Your answer is awaiting moderation.