Katie Mack
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astrokatie.com
Katie Mack
@astrokatie.com
Cosmologist, pilot, author, connoisseur of cosmic catastrophes. TEDFellow, CIFAR Azrieli Global Scholar. Domain verified through my personal astrokatie.com website. She/her. Dr.

Personal account; not speaking for employer or anyone else.
#KatieTrainDay postscript with final travel-time accounting: I departed Aldershot Station at 11:43am (scheduled departure had been 9:01am, and I had arrived early) and I rolled into NYC at about 12:45am. So 13 hours station-to-station, but about 18.5 hours door-to-door.
January 27, 2026 at 4:15 PM
What this means, of course, is: another train 🚇 #KatieTrainDay
January 27, 2026 at 6:07 AM
I have arrived in New York! I made it! I am here! #KatieTrainDay
January 27, 2026 at 6:04 AM
No views of the city yet but the Moon is bright across the Hudson. #KatieTrainDay
January 27, 2026 at 5:40 AM
Somewhere between Rochester & Syracuse. Sky has cleared and is now wonderfully blue and pink, but as we travel the snow kicked up by the front of the train still lends the view some vague Snowpiercer vibes. My car is now half full but everyone is quiet. We’re all in this together. #KatieTrainDay
January 26, 2026 at 9:57 PM
We are on the move again! 🚂

Just after we started, Amtrak guy walked through car talking to other employee saying, in an exasperated tone, "He said it's probably gonna happen again. Every time, we just have to keep on resetting it."

Meanwhile, scenery is… very white. #KatieTrainDay
January 26, 2026 at 9:04 PM
Back on the train and moving again! By using the clever technique of walking a little farther from the door and passing through the vestibule between cars I have ended up with an entire train car to myself! It is wonderfully quiet and peaceful. Time for a snack and some laptop work. #KatieTrainDay
January 26, 2026 at 7:05 PM
Just crossed to the U.S. at the Niagara Falls train border. Off train for passport checks. Two women who’d been sitting across from me were apparently planning to get off at the CANADA-side Niagara station & missed the announcement. But they have crossed over now; fate unclear. #KatieTrainDay
January 26, 2026 at 6:57 PM
The train people felt bad about the delay and gave us all free hot drinks.
#KatieTrainDay
January 26, 2026 at 5:18 PM
On my way! You’ll just have to imagine a proud dramatic train whistle sounding here. (Thx @peacewind.aero for video.) #KatieTrainDay
January 26, 2026 at 5:16 PM