A European mission will intercept an unknown comet for the first time 20 June 2019

The “Comet Interceptor” will launch in 2028 and loiter a million miles away until an interesting and accessible comet is found.
Examining comets from the outer reaches of the solar system could help figure out how much of the water on Earth originated from comets.
[MIT Technology Review]

A small step backward for mankind 5 November 2014

Why America needs to embrace a culture of risk in order to build the next-generation space program.
How and why to be resilient in the face of failed spacecraft, and the loss of life.
[Foreign Policy]

How High the Moon? 4 October 2013

Book Review: ‘Dreams of Other Worlds’ by Chris Impey and Holly Henry
Where the Milky Way’s missing arms went and other tales of astronomical discovery.
[Wall Street Journal]

Promise me the moon 31 January 2012

The emotional appeal of Gingrich’s space policy
The Republican presidential candidate wants to build a base on the moon. So do I.
[Huffington Post]

Salvaging space 1 September 2011

Cleaning up low-Earth-orbit debris might lead to new space technologies.
Why problems are sometimes useful to have.