fig 1
On February 22, 2012,
in ,
by David M. Acklam
About the author
David M. Acklam
I'm a retired professional engineer actively involved in community outreach working with our local educators to help engage our youth in the sciences and mathematics. I enjoy sharing our night sky as an amateur astronomer and volunteer with the Project ASTRO program, the Flandrau Science Center, the Lunar and Planetary Laboratory Kuiper Circle and as a docent with the Planetary Science Institute. I've been a Mac user since 2007.


















