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Mr Stephenson presenting the Rockefeller twin astrograph telescope

Astronomy Broederstroom Leiden Southern Station Observatory Mr Stephenson

Mr Stephenson presenting the Rockefeller twin astrograph telescope

Lecture on the Broederstroom telescope

Astronomy Broederstroom Gifted Children School Leiden Southern Station Observatory

Lecture on the Broederstroom telescope

South African Astronomical Observatory

Astronomy Cape Town SAAO

South African Astronomical Observatory