Fixed Pen/Signature Book
inverted NASA Space Pen secured in shelf, gallery sign-in book

Visitors are invited to write their names in the spiral-bound notebook by moving a blank page over the tip of the fixed pen. Designed by NASA at great expense, this implement (also called a “moon pen”) can write at any angle. Scientists working in the Russian space program exploring the problem of how to mark surfaces in zero-gravity determined that lead pencils worked well enough.