New Site Using WordPress

It’s time to move away from hand-edited HTML to a real content-management system. The old site’s content will appear gradually, starting some time in the future. But for now, this is a fresh start. This site uses the StudioPress Genesis Framework with the Associate child theme. Most of the front page’s widget areas are unused. Widgets [Read More…]

The TRAPPIST-1 Chord

Update: Since the original announcement, astronomers have obtained more accurate estimates of the planets’ orbital periods, including the period of a seventh planet. This post has been updated with the new data. In February, 2017, astronomers announced that the nearby star TRAPPIST-1 has seven Earth-like planets. The orbital periods of the planets have nearly integer ratios. When periods are [Read More…]