Archives for 2017

The TRAPPIST-1 Chord

In February, 2017, astronomers announced that the nearby star TRAPPIST-1 has seven Earth-like planets. The orbital periods of the six innermost planets have nearly integer ratios. When periods are related by integer ratios, then the corresponding frequencies are related by integer ratios, too. The orbital frequencies of the six innermost Earth-like planets of TRAPPIST-1 have nearly integer ratios of 3:4:6:9:15:24. [Read More…]