Hubble: Fifth Servicing Mission (SM4)

As has been announced already 2 days ago, NASA decided on having a servicing mission to the Hubble space telescope. After the Columbia accident Hubble's future looked dark, as the much needed maintenance visit was stopped due the halted Shuttle programme and NASA even decided to give up on Hubble, leaving us with no optical space telescope. The main problem are the gyroscopes which are needed to do the 'steering'. The abandonment of the space telescope yielded an uproar in the scientific community, but with the Shuttles not flying and even if flying their restriction to deliver parts to the ISS put a service mission far off.