I have contributed a number of articles to Smithsonian Air & Space Magazine, which have run in both the print and online editions. In reverse-chronological order:

• Penguin Spotting, and Other Cool Satellite Tricks (April 2018 print edition)
• Could Future Telescopes Do Without the Mirror? (February 2018 print edition)
• The First Sighting of a Black Hole (February 2017 print edition)
• The Universe is Ringing (July 2015 print edition)