Astrophysicist (He/Him)

Thomas Donlon II, Ph.D.

Postdoctoral astrophysicist studying the Milky Way's dark matter and dynamical history through acceleration measurements and computational modeling of our Galaxy.

Thomas Donlon II, Ph.D.

About Me

I am currently a post-doc at the University of Minnesota Twin Cities, where I work in Prof. Lucy Fortson's group. I am also involved in Zooniverse, a citizen science platform that allows the public to participate in scientific research.


The focus of my current research is using direct acceleration measurements to study the dark matter content of the Milky Way. I aim to use real-time Galactic dynamics to answer how our Galaxy formed, evolved, and continues to change. My other interests include Galactic structure, Galactic archaeology, pulsars, variable stars, and shell galaxies. My work combines observational data with computational physics and machine learning techniques in order to make discoveries about our Galaxy.


I obtained my PhD at Rensselaer Polytechnic Institute in 2023, where I studied the structure and chemical makeup of our Galaxy with Prof. Heidi Jo Newberg. I also spent time as a post-doc at the University of Alabama in Huntsville with Prof. Sukanya Chakrabarti, where I studied pulsars and their use as probes of Galactic structure.

Recent Highlights

twin-cities.umn.edu Feature

A milestone for Zooniverse: 1 billion classifications

Details surrounding Zooniverse's historic milestone of 1 billion classifications, highlighting the contributions of citizen scientists and the impact of their work on scientific...

Latest Publication

An Acceleration is Worth a Hundred Thousand Phase Space Measurements

2026 preprint — We show that a single direct acceleration measurement contains the same information as hundreds of thousands of star positions and velocities. Due to significant biases in Jeans...

Latest Writing

What it Means to be Alien

July 2026 — Lately, through a prolonged series of unfortunate travel mishaps, I’ve been spending a lot more time sitting on airplanes than I normally would like to. This means going through...