Planeta U, usually called
Tu Planeta U, is a three hour block of children's programming that airs on
Saturday mornings on the Spanish language
Univision network. Debuting on April 5, 2008, Planeta U features programming that comply with federal
E/I content rules as mandated by the
Federal Communications Commission. A second edition of the programming block, an hour in length on Sunday mornings at 9 AM ET, began airing in March 2010.