Live coverage: Falcon 9 rocket lifts off on first Starlink rideshare mission

SpaceX is preparing for liftoff Tuesday of its first mission for the U.S. Space Force, a launch from Cape Canaveral that will deploy a new GPS navigation satellite using a redesigned profile to allow the Falcon 9 rocket’s first stage booster to reserve enough propellant for landing on SpaceX’s drone ship in the Atlantic Ocean.

Orbital ATK’s bid to join the U.S. military’s roster of rockets to haul the most critical national security satellites into orbit faces stiff competition from entrenched launch providers and billionaire entrepreneurs, but the company is confident its Next Generation Launch system will win one of three funding agreements the Air Force is expected to award this summer.

Expect fewer missions to study planet Earth in NASA’s future, agency officials told an advisory group last week. A blueprint of the Trump administration’s proposed NASA budget would cancel four Earth science missions already in the agency’s portfolio and slash research funding geared toward future projects.