This led to an increased warming rate for the instrument and reduced its original expected lifetime of 4.5 years to about 2 years.Iranlose Isatunse 3A Servicing Mission 3A, flown by Discovery, took place in December 1999, and was a split-off from Servicing Mission 3 after three of the six onboard gyroscopes had failed.. 
The Heritage team is composed of Amateur and professional Astronomers, as well as people with back outside Astronomy, and Emphasizes the aesthetic nature of Hubble images.. 