YES! You are correct! And, lol.
I'm a Docent there, and this is actually a wooden radial that used to be part of a display. I assume you're in the area too?
Oh awesome! I docent on the Space side, and try and work every other Sunday, but work and house stuff has had different plans, so I probably won't be regularly there again until October.
But please do ping me if you're heading out, it'd be great to meet you!
(And we are always looking for Docents…)