It could be a good time event.
The Sands of Time: The Physics of Time, 7 p.m., Tuesday at Marie Drake Planetarium, 1415 Glacier Ave., will cover how the concept of time is impacted by physics.
The thoughts of luminaries such as Isaac Newton and Albert Einstein will be discussed.
The free, all-ages event will be followed by a presentation of “The Stars Tonight” on the Spitz projector.