It’s the height of spring field trip season at Morehead.
Most of the school buses in our parking lot traveled one or two hours to visit us, but groups come from all over the state. Last week, kids from Manteo came to Morehead. A Cherokee Boys Club charter bus makes an appearance almost every year. It’s fun to welcome them to the planetarium, our favorite state treasure.
For the kids, part of the fun is checking out Morehead’s gift shop after their planetarium show. It’s stocked with educational books and science-themed toys, of course. But their favorite item, the one that our gift shop manager continually has to restock, is rock candy. (If you’re patient, you can make it at home with this science experiment. But if you don’t want to wait seven days, Morehead’s your source for instant gratification.)
What else is really popular with the kids? Anything gooey and icky, like Mars Mud and Galactic Goo. Glow-in-the-dark stuff. (Especially cool: bandanas that have constellations printed on them in glow-in-the-dark paint.)
And mood rings. Lots and lots of mood rings go home with Morehead visitors of all ages.
Did you have a mood ring when you were a kid? Mood rings feature a “stone” that turns colors — black, green, blue. Theoretically, the colors reflect your mood, but actually it’s an indication of your body temperature. There are liquid crystals that are sensitive to heat inside the “stone,” and the position of those crystals affects the wavelength of light. That’s how mood rings change color.
Believe it or not, NASA is using that same “technology” in its search for undiscovered planets. Apparently, the combination of liquid crystals and zero gravity result in better telescope viewing.
And that’s not all. Scientists are exploring the value of color-changing crystals in measuring the impact of bomb blasts in war zones. This development could provide a better understanding of how people living and working in those zones may have been affected, resulting in better medical treatment for them.
You can’t do that with rock candy.
Ron Risch, Morehead's gift shop manager, just checked his records -- 1,433 visitors bought mood rings last year!