from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Plural form of periastron.
Sorry, no etymologies found.
Furthermore, Kashi retested his model for a 6 solar mass companion and showed the similarity between periastrons and eruptions was still a good fit making the model robust.
But a 2:3 tidal lock, in which opposite sides of the planet face the star on successive periastrons, might be okay.