Sergio, don't at anytime consider yourself as ignorance. Feel free to ask at anytime
The column of the large stand, below the final bead and upper part of the sphere, you've turn as a bird's beak what would be called a fillet, a step separating coves, beads, swells any part which makes up details on a spindle, even on a bowl/flat work etc.
It would have been to turn a flat fillet to the under side of the sphere and match it in depth/size as a repeat fillet to the base as half bead, then have a clean cove between them.
Have attached picture for example. David