The cemetery is a 30-minute walk from the Greenwich Observatory.

Greenwich Observatory was used to define the official time for the whole country, and the zero line of longitude.

Bourdin's motives remain a mystery as does his intended target, which may have been the Greenwich Observatory.

Friends at Greenwich Observatory encouraged him and he had some access to instruments there.

The clock time in this zone is based on mean solar time at the 135th meridian west of the Greenwich Observatory.

His duties included the servicing of the instruments at Greenwich Observatory and making two new equatorial sectors.

Observations at the Greenwich Observatory itself ceased in 1954, though the location is still used as the basis for the coordinate system.

The Greenwich Observatory had placed itself at the doctor's disposal.

This was considered the first significant contribution of the Greenwich Observatory.

Flinders gave him the chronometers to return to the Greenwich Observatory.