The Sokol space suit of Bulgarian cosmonaut Aleksandar Aleksandrov

June 7 pairs a quiet act of institution-building with a spectacular one, joining a learned society and a spaceflight in Bulgaria’s history.

1896 — The Bulgarian Naturalist Society Is Established

On June 7, 1896, scholars and nature enthusiasts founded the Bulgarian Naturalist Society in Sofia, drawing together researchers in zoology, botany, and geology to study the country’s natural environment systematically. At a time when Bulgaria’s academic institutions were still taking shape, it encouraged fieldwork, scientific exchange, and the publication of observations.

The society put natural science on a durable institutional footing. It helped document Bulgarian species and landscapes, linked specialists across disciplines, and strengthened public regard for scientific knowledge — one thread in the country’s intellectual modernization after the Liberation.

1988 — Alexander Alexandrov Begins Bulgaria’s Second Space Mission

On June 7, 1988, Bulgarian cosmonaut Alexander Alexandrov launched aboard Soyuz TM-5 for the Mir space station. The joint Bulgarian-Soviet flight followed Georgi Ivanov’s 1979 mission and carried a broad Bulgarian research programme spanning space medicine, materials science, remote sensing, and plant growth.

Within the Intercosmos programme, the mission showed how deeply Bulgaria was involved: its institutes designed the equipment and experiments rather than filling a purely symbolic seat. The flight became a landmark in the country’s science and technology history and drew a new generation toward astronomy and engineering.