The dome

The Bükk Astronomical Observatory provides a unique possibility for astronomical observations.

The building is situated at 635 m high above sea level, thus the stars show a lot clearer and sharper image than watched from the Alföld, the Great Plains of Hungary. In the winter, fog often settles in the Carpathian Basin, but bright sunshine receives the visitors in the area of Répáshuta.


Under the biggest standardized astronomical dome of the world, you can find the main instrument of the observatory, a 61 cm diameter corrected Dall-Kirkham type astrograph, with the help of which the built-in corrected lens provides dot-like imaging, free of coma and spherical errors. The tube itself is 109 kg, the telescope mount, the three telescopes and the counterweights altogether weigh almost half a ton. The tube is included in a carbon fiber grid structure, which at the same time provides maximum stability for the instrument.

The telescope was primarily made for astro-photography purposes, however, it is also excellent for visual (naked-eye) observations, due to the 2-inch high quality eyepieces used with it. Due to its light collecting ability, it is the most suitable instrument for observing primarily vague deep-sky (galaxies, globular clusters, planetary nebula). Besides naked-eye observations and astronomical imaging, with the telescope we also carry out scientific observations, so we can collect information valuable for science about the objects of the solar system, or about other stars.


A special sun telescope can also be found in the dome, with the use of which our central star can safely be observed. This Lunt type hydrogen-alpha telescope has the diameter of 10 cm, and with the help of it sunspots, solar flares can be observed the way it could never be seen with the naked eye.

Important: You mustn’t ever look into the Sun with naked eye, or with a telescope not optimized for the observation of the sun, because it may cause the damage of the eyes, or even blindness straight away!