We entered the sphere to find spheroid structures inside. We can go inside forever there will be still smaller spheroids inside. Same in the other direction. You can leave as many spheroids as you like, you will still be inside a spheroid. You can coninue forever! Infinite in both directions. Fractals are a cool brain tool to get a feeling for infinity.

fractal original rendered with 96Megapixel 12000x8000pixel
rendered with mandelbulb3D freeware.