While these changes are going on in the chromatin the amphiaster forms.
As the amphiaster grows the centrosomes are grouped in a plane at the equator of the spindle, forming the Equatorial Plate.
amphiaster am·phi·as·ter (ām'fē-ās'tər)
A double-star figure present in the cell during mitosis, consisting of two astrospheres connected by a spindle, formed just before the division of the nucleus. Also called diaster.