DAS Activities

DAS Public Nights

Public Nights
Tuesday and Thursday at
DU's Historic Chamberlin Observatory
Current start time is 8:30 pm.

Costs to the public are:
$4.00 adults, $3.00 children

To book, please click:

Public Night Reservations

Denver Observer

March 2019 Skies

© Zachary Singer

In March, we have a relatively quiet month for planets: Most of them are now early-morning objects, but they are at a greater angle from the Sun, allowing better observing. In the “Stars and Deep Sky” section, we’ll look at two stars in the constellation Cancer—the first is a wonderful […]

Astro Update, March 2019

Selected Summaries of Space News More New Horizons Results

More data has been received from the New Horizons spacecraft since its recent flyby of the Kuiper Belt object informally named Ultima Thule. One new result is that the larger of the object’s two lobes is not so much spherical, as thick-pancake-shaped. This shape was determined […]

President’s Message, March 2019

Passing the Gavel

This month, we have a joint message, with Ron Hranac, our outgoing president, starting off. Ed Ladner, the DAS president-elect, follows… —Editor

February’s well-attended annual membership meeting had a packed agenda, including election of Executive Board (“E-Board”) officers and trustees to serve a one-year term beginning later this month. A tip o’ […]

February DAS In-Reach Cancelled

The DAS In-Reach originally scheduled for Saturday, February 23rd, 2019, has been cancelled.

DAS News, February 2019

Lunar Eclipse Photos

DAS members were out in droves for the January 2019 full lunar eclipse, and they sent in some of their images… Here’s a selection of their work:

This picture shows the Moon every half hour during the lunar eclipse. Each image is aligned with respect to the Earth’s shadow, so you […]

February Skies 2019

Open cluster M37, by Joe Gafford.


by Zachary Singer

Some of our favorite planetary targets, Venus and Jupiter, are up in the pre-dawn sky this month, and Mercury appears in the evening, as we’ll see in “The Solar System,” below. In “Stars and Deep Sky,” we’ll take a look at two […]

Astro Update, February 2019

Selected Summaries of Space News

by Don Lynn

Kuiper Belt Object Flyby

On December 31st, New Horizons (Pluto spacecraft) flew by the Kuiper Belt object 2014 MU69, since unofficially named Ultima Thule, at a distance of only 2200 miles, fervently taking images and other data. This was the farthest-from-Earth spacecraft encounter with any […]

President’s Message, February 2019

Getting Involved

by Ron Hranac

Denver Astronomical Society is a volunteer-based organization that has been serving Colorado’s Front Range for nearly 70 years. Indeed, we wouldn’t exist if it weren’t for the countless people who have made and continue to make DAS what it is today.

A couple questions that come up from […]

January 26th In-Reach CANCELLED

Please note that the DAS In-Reach originally scheduled for this evening, Saturday, January 26th, has been cancelled. (Separately, we have some good news about our In-Reach program, and we’ll post that soon.)

Lunar Eclipse Party Update

We’ve been fielding questions these last few days about whether the DAS is hosting any activities for the upcoming Sunday, January 20th lunar eclipse. (Click here for an explanation of the eclipse and its timing.)

While DAS is not having an event, Mile High Astronomy, run by our own Sorin, is—they’re roping off their parking […]

January Skies 2019

by Zachary Singer


We start the first month of the New Year off with a splash—a total lunar eclipse on the night of January 20th. Along with that, we have planets and two targets in Eridanus—one is an important multiple-star system, and the other a striking planetary nebula.

Lunar eclipses happen when […]

January General Meeting

Join us on January 18th, 2019, at 7:30 PM, for our monthly General Meeting. We’ll have a call for Executive Board Nominations, and a presentation by Dr. Graham Lau on “THE CRAZIEST CREATURES ON EARTH: What the world’s wackiest organisms can tell us about life in the cosmos.”

For a full description of the presentation […]

Astro Update, January 2019

Selected Summaries of Space News

by Don Lynn

Phobos Grooves Explained

Since the first close-up images were taken of the Martian moon Phobos decades ago, scientists have argued about why there are long grooves on its surface. Leading theories were that the moon cracked from an impact or from tidal forces. But there […]

The Denver Observer Moves Online!

Happy New Year, and welcome to the new home of the Denver Observer, the newsletter for the Denver Astronomical Society. This page is just getting started, but the trickle of posts (or “articles,” if you want to kick it old-school) will soon become a steady stream, and you’ll find the same content here that you […]

President’s Message, January 2019

State of the Society

By Ron Hranac

You may recall that we hit a major membership milestone in 2017, passing the 500 mark for the first time ever. As of December 26, 2018, the count was a record 563, up from 502 at the same time in 2017, 457 at the end of […]