NASA Shuttle Launch: NASA TV Live, The space shuttle countdown to the planned launch early Sunday of Endeavour shuttle and six astronauts is continuing without issues at Kennedy Space Center as NASA gets ready to start critical propellant-loading operations later tonight.

The 18-story spaceship and its crew stay scheduled for NASA shuttle launch at 4:39 a.m. Sunday, the middle of a 10-minute chance to put Endeavour and its astronauts on way for a meeting and wharfing with the International Space Station. Meteorologists state there is an 80 percent chance the weather would be acceptable for Shuttle launch time. Check out the Official Launch Forecast from the Air Force 45th Space Wing Weather Squadron.

NASA aims to start loading more than a half million gallons of liquid hydrogen and liquid oxygen into the shuttle’s 15-story external tank at 7:14 p.m. You can watch live coverage of the three-hour operation here in The Flame Trench. Click the NASA TV box on the right side of the page to launch catch commentary on NASA TV Live.