July 2 Star Party at Bombahook Observatory


The clear sky chart looks promising this evening and the winds are predicted to moderate but maintain enough of a breeze to keep the mosquitos away. Feel free to come early if you need to set up (7:30pm). We should be able to see the bright planets sometime around 9:00pm, but astronomical darkness for . . . → Read More: July 2 Star Party at Bombahook Observatory

Work Day at Brower Observatory

The work day at Brower Observatory is especially important. Our observatory needs maintenance. It is no longer completely watertight, but seeps in rain and snowmelt. To fix it before it outright leaks, we’ll be replacing the roofing shingles, fixing flashings in the walls and dome, and installing a new door. Please help us on Saturday, . . . → Read More: Work Day at Brower Observatory

Schedule of Star Parties through March, 2017

Below is a list of the dates for CMAS’s star parties through March, 2017. They are presented in sets of two. The first date in each set is the intended date for the star party; the second is the rain date. These are the Saturdays before and after the new moons, timed to avoid interference . . . → Read More: Schedule of Star Parties through March, 2017

Planetary Star Party Tonight

Tonight, Mars will be about as close to the Earth as we’ll see it in the next few years. That means it will be especially large and bright in the eyepiece. Honestly, if we miss tonight, it will appear about the same for the next few weeks, but it’s fun to see it this near . . . → Read More: Planetary Star Party Tonight

Memorial Day Weekend Star Party

Even though it’s the start of Memorial Day Weekend, we have decided to have a star party this Saturday, June 28, 2016, at Brower Observatory. It will be dark enough to begin observing by 9:00pm, but earlier setup is always welcome. If it’s cloudy on the 28th, the make-up party will be at DRA instead . . . → Read More: Memorial Day Weekend Star Party

Solar Viewing at Bombahook

It’s official! Brian Murphy will be hosting a solar party today, in the afternoon before tonight’s star party, but at his home, not at DRA. Viewing starts at 3:00pm and ends at 5:00pm, leaving time to pack up, get dinner, and head to DRA. Everyone is welcome. Details at the Facebook page created for this . . . → Read More: Solar Viewing at Bombahook



With apologies for the omissions suggesting something were brewing, and for the sudden notice now, the business meeting originally set for tomorrow night (Saturday, April 30, 2016) is postponed, and the star party is moved to DRA. Sorry; it turns out that Colin will unable to attend, . . . → Read More: CMAS Star Party — LOCATION CHANGED


Jacob Gerritsen, host of Galaxy Quest Observatory, remains a committed member of CMAS and a true enthusiast of astronomy; yet, due to welcome if somewhat erratic changes in his schedule, we have had to re-think how we plan for star parties at Galaxy Quest. In short, he can plan for star parties maybe a month . . . → Read More: GALAXY QUEST’S NEW SCHEDULING

Report on Occultation of Aldebaran by the Moon

Having been unable to see Aldebaran in the clear sky through any of my optics all day, and with clouds rolling in from the West, Bridgit and I decided not to alter prior plans in the hope of seeing the likely invisible. We would head out for the evening, but stop briefly along the way, . . . → Read More: Report on Occultation of Aldebaran by the Moon

Occultation of Aldebaran by the Moon

I’ve experimented with using optics for the occultation later this afternoon, and am happy to present my findings for this do-it-yourself observing project for the astronomer at home. The hope is to see a bright star vanish and later reappear in broad daylight. This will not be a feat not of magic, but celestial mechanics. . . . → Read More: Occultation of Aldebaran by the Moon