A borked bit of code sent the Hubble Space Telescope into safe mode, revealing a bunch of other glitches

While engineers have recovered the spacecraft – after all, this is why "safe modes" exist – the problem has shown up other issues. Most seriously, the aperture door at the top of the spacecraft did not automatically close.

The 30th anniversary of the telescope's launch rolled around last year and engineers hope to keep the old thing going a while yet, even if the Shuttles that originally serviced it are long gone.