It appeared in the sky and quickly disappeared.According to NASA,
"From the Mission Control Center at NASA's Johnson Space Center in Houston, the booster officer confirmed Atlantis' trio of main engines cut off on time at 2:10 p.m. With Atlantis safely in orbit, its giant external fuel tank was jettisoned. Onboard cameras will record the tank's condition as it falls away from Atlantis and descends toward Earth.
During the 11-day mission's five spacewalks, astronauts will install two new instruments, repair two inactive ones and perform the component replacements that will keep the telescope functioning into at least 2014".
