Monthly meeting

October 1, 2020 @ 7:00 pm – 9:00 pm
via Google Meet


Speaker: Don Pensack from EyepiecesEtc

Topic:  Nebula Filters

  • What’s happening in nebulae atomically for them to emit light
  • How light pollution impacts the view and how light is additive
  • What our scotopic vision can and cannot see
  • How filters work
  • Matching different emissions to different filters, i.e. brightness of background sky v.contrast, spectral matching, magnification matching

Monthly meetings are open to all – you needn’t be an MAS member to attend. These meetings normally take place the first Thursday of each month at the Fairview Community Center in Roseville (“Great Room”). Monthly meetings start at 7:00 p.m. and last about two hours.

Each meeting features Board member introductions, general announcements, “Better Know a Constellation”, normally presented by a member, main speaker (around 45 minutes duration) and an after-meeting social gathering. Society business is occasionally transacted as needed.

NOTE: Meeting time and / or location sometimes change to take advantage of special program opportunities. Please check the MAS homepage at for the latest information regarding the meeting.