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



Monthly Skies, Summer 2019

by Zachary Singer

My Friends,

It’s been four years since I came on as the Denver Observer’s editor and (soon after) writer of the “Monthly Skies” column. When I started, we were still putting out an eight-page PDF—it was accompanied by a printed black-and-white edition. I miss the old publication in some ways, […]

Five Nights in the Magellanic Clouds

A Tour of the Night Sky as Seen from San Pedro de Atacama, Chile

by Jeff Kanipe


This month, we have a wonderful surprise for you—a tour of the southern sky, as seen from Chile, by Jeff Kanipe, author of the highly regarded series, Annals of the Deep Sky. His report covers […]

May 2019 Skies

by Zachary Singer

Along with the planets this month, we’ve got two targets in the constellation Canes Venatici—one is a sun-like star, and the other a bright spiral galaxy. Let’s get going…


April 2019 Skies

by Zachary Singer

For April, we’re looking at a beautiful binary in Leo, and some galaxies in a tight grouping—but perhaps not the one you’re guessing! First, though, we have the planets….


Astro Update, April 2019

Selected Summaries of Space News

by Don Lynn

Asteroid Sampled

Hayabusa2 (a Japanese spacecraft) has touched down on its target, the asteroid Ryugu, and completed a procedure to fire a projectile into it and collect the debris blown off. Another sample will be taken from inside a fresh impact crater to find out […]

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 […]

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 […]

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 […]

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 […]