[Telepathic Intruder]

Yes, of course. And by the way, that doesn't rule out a planet (or moon) having something big in their skies, it just rules out having something big and close, because tidal forces decrease far more rapidly with distance than total gravitational force (an inverse cube law instead of an inverse square). So it's perfectly reasonable for Pandora in the Avatar movie to have a looming gas giant in the sky, but not a close-orbiting similar-massed object.

[alexander_busek]

So it's perfectly reasonable for Pandora in the Avatar movie to have a looming gas giant in the sky, but not a close-orbiting similar-massed object.

Quite. Or even a close-orbiting object with a similar apparent size (but perhaps even far lower mass).

Regards,