In regards to Sag-A*, the
Distant Worlds II organizers have written up a CG proposal that would include the building of an astrophysics lab at the galactic core as part of the expedition goals in Q4 2018... if its accepted by FD then combining that with a community effort to honour Stephen Hawking would be a fitting tribute imho. A grand adventure to the core with a mission to build a science installation at, or near, Sag-A*. The manpower to pull it off will be there with over 2,200 players already signed up to the expedition... possibly doubling that by Q4 when its promoted further.
But DW2 will probably do something to honour Stephen Hawking regardless, maybe some sort of science-based events during the expedition as we already have a science-based project in the pipeline for DW2 that could be adapted to include black holes and whatever new environmental anomalies that are slated for Q4.