Video: Liftoff of Atlas 5 rocket with Mexico’s Morelos 3

SpaceX launched a Falcon 9 rocket Sunday from Cape Canaveral with 143 small satellites, a record number of spacecraft on a single mission, giving a boost to startup space companies and stressing the U.S. military’s tracking network charged with sorting out the locations of all objects in orbit.

Northrop Grumman’s Antares rocket will deliver a Cygnus supply ship into orbit Saturday to begin a pursuit of the International Space Station.

A highly sophisticated U.S. Air Force satellite to sound the alarm when an enemy missile launches has shipped to its Florida launch site for liftoff in October aboard a United Launch Alliance Atlas 5 rocket.