God, normal cosmology fails at this.
EO planet is ball of water with rocky core and ocean floor with biomass. In normal cosmology, that would mean it wouldn't be an especially large planet and most likely in a good orbit with a star.
Red Star is a glowing object that orbits the EO planet. for it to be small enough to orbit without causing gravitational problems, it would be orbiting very close.
However, the Red Star is apparently bright enough to be seen from Bara Magna, which is also a planet. That would mean Bara Magna is close to the EO planet, like, in the same solar system, in normal cosmology.
However, this would imply that they can see the EO planet too. So we'd know if the EO planet was huge and that the Bara Magna planet orbits it because there would be a giant blue ball in the sky. However, it does not and there isn't, so therefore EO is normal-sized. So if they can see the EO, then perhaps it is one of Bara Magna's moons. We haven't seen them yet. There's also the matter of EO planet's moon, which could be the other moon of Bara Magna. Or they're a binary planet system. The only sky we've seen is the one around Mata Nui, so who knows what's on the far side.
Or it's something totally different.