invariable plane

Questions

What does invariable plane mean?

The orbital plane passing through a planetary system's barycenter (center of mass) perpendicular to its angular momentum vector.

How to pronounce invariable plane

1. Open the pronunciation page — Open the Speakur entry for “invariable plane”.
2. Read the phonetic spelling — Read the IPA spelling () so you know which sounds to aim for.
3. Play the audio — Click Play to hear reference audio for “invariable plane”.
4. Repeat and practice — Say “invariable plane” aloud, matching stress and vowels until it feels natural.