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



DAS Holiday Banquet

December 16, 2018 @ 6:00 pm – 9:00 pm
Embassy Suites Denver Tech Center
10250 E Costilla Ave
Centennial, CO 80112
Lindsey Shaw

Reservations have closed.


Check in at 6 pm (no reservations at door)
Cocktail Hour (cash bar) from 6-7 pm, dinner at 7 pm,
Technical presentation at 8 pm

Dinner Menu:

Embassy House
Mixed Greens, Sun-dried Tomatoes, Bacon

Meat Choice – Lemon Thyme Chicken
Wild Mushroom Risotto and Seasonal Vegetable

Vegetarian Choice – Butternut Squash Ravioli
Sweet Peas, Hazelnut Brown Butter & Haystack Mountain Goat Cheese

Flour-less Chocolate Tort


Not What We Expected: Oddities in the Outer Solar System

Ann Marie Madigan Ph.D.


The orbits of minor planets beyond Neptune are behaving strangely. They tilt and cluster together in bizarre ways that don’t conform with our story of the Solar System’s formation and evolution. In this talk, we will present the latest theoretical ideas to explain what’s going on: is there a new planet in the dark, outer regions of the Solar System, or could the collective gravity between minor planets be more important than we thought?

Jacob Fleisig

Dr. Ann Marie Madigan is a theoretical astrophysicist who studies the strange orbits of icy bodies in the outer Solar System. Born in Dublin, Ireland, she moved to the Netherlands to pursue her PhD on the motion of stars and gas around supermassive black holes. She continued her research as a NASA Einstein Postdoctoral Fellow at UC Berkeley, before joining the Department of Astrophysical and Planetary Sciences at the University of Colorado, Boulder as an assistant professor in 2016.

Jacob Fleisig is an astrophysics undergraduate currently finishing his senior year at the University of Colorado Boulder. For the last two years, he has been studying Solar System dynamics, particularly “self-gravity”, with Dr. Madigan. He plans to attend graduate school, attain his PhD and continue research in the field of Astrophysics.

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