eLife assessment
This study, of interest to cell biologists, presents valuable findings on the positioning mechanics of microtubule asters in Drosophila embryo explants. While the experimental setting is artificial (centrosomes are detached from nuclei and the cell cycle is arrested in interphase in these explants), it extends the framework of aster positioning from recently published work. The authors reach the conclusion that asters interact via pushing forces, an interesting conclusion supported by solid evidence. The identification of motors and MAPs functioning in the aster positioning mechanism would further strengthen the study.