Atlantis and its crew of seven astronauts are scheduled to be back home on Thursday, but forecasters predict bad weather so the landing maybe delayed.

Atlantis astronauts have successfully installed solar arrays, they have repaired the Russian computer, and now they are coming back to the earth, hopefully.

Initially Atlantis' Mission was scheduled for eleven days, but two more days were added, because astronauts needed spacewalks.

While Atlantis were unfurling two new solar arrays at international space station, a Russian navigation computer hang up and caused a mass of problems to the crew.

Shuttle Atlantis successfully launched on Friday at 7:38 p.m. Eastern time to continue the building of International Space Station. Its flame brightened clear evening sky and left dense columns of smoke.

NASA resolved problems of the lines connecting external fuel tank to Atlantis on Wednesday. Now the first space shuttle is getting ready for the launch on Friday at 6:38 p.m. CDT. Forecasters predicted 70 percent probability of good weather.

Indian American astronaut Sunita Williams has assembled a spacewalk tool that may help her two companions in space in retracting a solar array during their two spacewalks on 30th May and 6th June.