T-3 Hours and Holding; Tanking Complete

At NASA's Kennedy Space Center in Florida, the countdown to launch of space shuttle Endeavour on its STS-127 has entered a two-hour, 30-minute built-in hold at T-3 hours. This hold will last until 2:08 p.m. EDT.

Tanking operations are complete. with both propellants -- liquid oxygen and liquid hydrogen -- now in stable replenish. The loading of the space shuttle's external tank began at 8:38 a.m. and proceeded smoothly throughout the three-hour process.

Weather at Kennedy remains at 60-percent chance for favorable weather for an early-evening liftoff at 6:03 p.m. The primary weather concerns for launch are the potential for showers and thunderstorms near the Shuttle Landing Facility.

Full countdown coverage will begin at 12:30 p.m. on NASA Television and NASA's Launch Blog.

STS-127 Mission Overview

The 16-day mission will feature five spacewalks and complete construction of the Japan Aerospace Exploration Agency's Kibo laboratory. Astronauts will attach a platform to the outside of the Japanese module that will allow experiments to be exposed to space.

The STS-127 crew members are Commander Mark Polansky, Pilot Doug Hurley and Mission Specialists Dave Wolf, Christopher Cassidy, Tom Marshburn, Tim Kopra and Canadian Space Agency astronaut Julie Payette. Kopra will join the space station crew and replace Japanese astronaut Koichi Wakata. Wakata will return to Earth on Endeavour to conclude a three-month stay at the station.