Some things are easy to see, and some things are not. Asteroids, for the most part, fall into the second category. But sometimes they give themselves away by their movement.
KeywordsHuman Vision Research Consortium Single Civilization Light Capture Real Danger
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
© Springer Science+Business Media, LLC 2008