Abastumani Observatory: Stargazing at the USSR's First Mountain Observatory

The Abastumani Astrophysical Observatory stands on Mount Kanobili, at about 1,650 meters, in the forested mountains above the small spa town of Abastumani, in the Samtskhe-Javakheti region of southern Georgia — the country in the South Caucasus. Founded in 1932 by the astronomer Evgeni Kharadze, it was the first high-mountain (alpine) observatory in the Soviet Union, and it remains one of the most significant scientific institutions in Georgia's modern history — among the more productive observatories in the USSR in its day, and still an active astrophysical research center (now the E. Kharadze Georgian National Astrophysical Observatory, part of Ilia State University). For travelers it offers something most scientific institutions don't: a mountain setting, historic telescope domes among the forest, and night-sky observation under conditions that, for inhabited European territory, are genuinely exceptional.

What is the Abastumani Observatory?

The Abastumani Astrophysical Observatory is Georgia's main astronomical observatory, on Mount Kanobili (~1,650 m) above the spa town of Abastumani in Samtskhe-Javakheti, southern Georgia. Founded in 1932 by Evgeni Kharadze, it was the Soviet Union's first high-mountain observatory and is now the E. Kharadze Georgian National Astrophysical Observatory, affiliated with Ilia State University. Set among forest, with telescope domes ranging from the 1930s to a 1.25 m reflector of 1977, it remains an active research center — and, thanks to the dark, clear mountain sky, one of the best stargazing destinations in the South Caucasus, with guided daytime tours and night observation sessions by arrangement.

Why the mountain was chosen

The site was selected around 1930–31, after expeditions surveying atmospheric conditions across the region identified the Abastumani area as having an unusually high number of clear nights, low humidity, little atmospheric turbulence at altitude, and — crucially for optical astronomy — almost no artificial light pollution. (The spot had pedigree: as early as the 1890s the Russian astronomer Sergei von Glasenapp had observed binary stars from a tower on the same mountain, work that helped draw attention to Abastumani's exceptional skies.) Those conditions, largely unchanged today given the remoteness and minimal development of the surrounding area, are what gave the observatory its scientific value in 1932 — and what make it one of the more rewarding stargazing destinations in the South Caucasus now.

History and scientific work

The observatory's history spans the full arc of Soviet science and its post-Soviet continuation. Founded in 1932 by Evgeni Kharadze (1907–2001) — who would direct it for some sixty years — Abastumani became a center for stellar spectroscopy, solar physics, and the study of comets and minor planets, its astronomers publishing in the international literature and training a generation of Georgian astronomers who worked across the Soviet scientific system. Among its noted results was early work on the polarized radiation of the Crab Nebula. The quality of the research was recognized well beyond Georgia.

The collapse of the Soviet Union brought the severe funding difficulties felt by scientific institutions across the post-Soviet space, and the 1990s and early 2000s were hard years, with lost funding and the emigration of experienced staff. The institution has partially recovered since — in 2007 it was integrated with Ilia State University in Tbilisi (it had previously been an institute of the Georgian National Academy of Sciences), restoring funding for the maintenance and operation of the main telescopes, and it remains active in both research and education.

The main research instrument is a 1.25-meter (125 cm) Ritchey–Chrétien reflector, installed in 1977 and now fully automated — among the larger telescopes in the Soviet astronomical network of its time. It operates alongside a range of older instruments distributed across the mountain's domes, including the distinctive 70 cm Maksutov meniscus telescope (1955) designed by Kharadze himself, a 1936 Zeiss refractor, and others — a span of astronomical technology from the 1930s to the present that gives the site a real depth as a scientific and historical artifact alongside its working research role. (Not all of the instruments are currently operational, and part of the historic collection is preserved in an on-site museum.)

The setting

The road up from Abastumani town climbs through dense Caucasian mixed forest before emerging onto the more open upper slopes where the telescope domes are spread across the mountain. In daylight the forest setting is one of the site's most attractive features — mature trees, clean mountain air, and the quiet of a high location far from any significant settlement give the complex a character at once scientific and deeply natural. The domes themselves — white cylinders and hemispheres of various sizes against the forest and sky — have a visual poetry that functional astronomical architecture doesn't always achieve.

The town of Abastumani below has its own historical interest: it was developed as a health resort in the late 19th century, primarily for the treatment of tuberculosis in the clean mountain air, in the manner of Borjomi and Tskaltubo. The Georgian poet and public figure Akaki Tsereteli is associated with the resort in its active period. The combination of spa town, forest, and observatory above gives the area a layered character that rewards more than a quick visit to the telescopes alone.

Stargazing

The night sky above Abastumani is among the darkest accessible from anywhere within reasonable reach of a Georgian population center. The nearest significant lights — Akhaltsikhe to the south, and the small towns of Samtskhe-Javakheti — are neither close nor large enough to affect the sky at the observatory's elevation. On clear, moonless nights the Milky Way appears as a genuine structural feature rather than a faint suggestion, and the naked-eye star count is far higher than from any urban or suburban location.

Organized stargazing visits can be arranged through the observatory. These typically include a guided explanation of the night sky, observation through one of the smaller instruments, and — when conditions and scheduling allow — a look through one of the larger research telescopes. The experience depends heavily on weather and the moon's phase, and visitors should be prepared for cloud to prevent observation even after a smooth journey up; that uncertainty is inseparable from astronomy and best accepted as part of the experience rather than treated as a failure of planning. The retro museum and the guided daytime tour (the astronomer-guides are widely praised) are rewarding in their own right, clear skies or not.

A practical note on cold: the mountain temperature drops sharply at night even in summer, so warm clothing is essential for any evening visit regardless of the daytime weather down in Akhaltsikhe or Borjomi. In autumn and winter it can fall well below freezing at the observatory's elevation, and visits then require serious preparation for the cold.

Getting there and visiting

• Location: Mount Kanobili, above Abastumani, Adigeni municipality, Samtskhe-Javakheti, southern Georgia; about 28 km (30–40 minutes) northwest of Akhaltsikhe, ~240–250 km from Tbilisi.
• Getting there: The road to Abastumani is paved and fine for a standard vehicle; from the town, the observatory road climbs several kilometers further to the dome complex on the mountain.
• Visiting: Daytime tours and night observation sessions run by appointment — arranging a visit in advance, and confirming current availability, is strongly recommended, since research work or maintenance can affect the schedule.
• What to bring: Warm clothing for evening and night visits in any season; clear weather is essential for stargazing, so check the forecast before traveling.
• Combine with: The spa town of Abastumani, Akhaltsikhe (Rabati Castle), Borjomi and the Borjomi-Kharagauli National Park, and the wider Samtskhe-Javakheti region (Vardzia).