- Past, Present, and Future of NASA: U.S. Senate Testimony
- Written Testimony submitted to the US Senate Committee on Commerce, Science, and Transportation, March 7, 2012.
- If I Were President…
- Part of collection of opinions on the topic: “If I Were President…” which appeared in the Sunday Review section of the New York Times, August 21, 2011.
- Earth in danger!
- A commentary on the many dangers facing the inhabitants of Earth, the Free Lance-Star, April 5, 2009.
- For The Love of Hubble
- The popular movement to keep the Hubble Space Telescope, and the march of discovery, alive. Parade Magazine, June 22, 2008.
- Vote by Numbers
- Commentary on the scientific analysis of polling data in the 2008 Democratic primaries, New York Times Op-Ed, June 6, 2008.
- Why America Needs to Explore Space
- A compelling argument for why America should remain a leader in space exploration, Parade Magazine, August 5, 2007.
- Where Even the Sky is No Limit
- A call to action for space innovation and inspiration, Florida Today, November 25, 2002.
- Destiny in Space
- A comparison of our achievements in space compared to Stanley Kubrick’s 2001: A Space Odyssey, New York Times Op-Ed, January 1, 2001.
- Misaligned Stars
- A commentary on science literacy in the arts and society, New York Times, July 22, 1998.
The Cosmic Perspective
Cosmic Perspective segments from NOVA scienceNOW, 2006–2009
Blue Collar Intellectuals
For the Planetary Society, 2006
- Blue Collar Intellectuals: The Fan
- Blue Collar Intellectuals: The Janitor
- Blue Collar Intellectuals: The Cabbie
- Blue Collar Intellectuals: The Delivery Guy
- Blue Collar Intellectuals: The Sanitation Truck Driver