BAR HARBOR — Neil Comins will answer questions from his book “What if the Earth Had Two Moons: And Nine Other Thought-Provoking Speculations on the Solar System” during a visit to the Jesup Memorial Library on Sunday, Sept. 13, at 3 p.m.
If the Earth had two moons, would it be the same as it is today? What if the Earth had a thicker crust?
Comins, a professor of physics and astronomy at the University of Maine, presents Books will be on sale at the Jesup that day with a percentage of sales donated to the library. Sherman’s is a co-sponsor of the event.
The event is part of the Acadia Night Sky Festival. The Jesup will host five events at the library as part of the festival, including a craft time for children at 1:30 p.m.. Also during the day will be a tour of the galaxy with Jon Thomas at noon and a presentation about Pluto and other dwarf planets with Bob Reichman at 1:30 p.m.