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Bülach Observatory

Astronomical observatories in SwitzerlandBuildings and structures in the canton of ZürichBülach
Sternwarte Bülach
Sternwarte Bülach

Bülach Observatory (German: Sternwarte Bülach) is a public astronomical observatory near Bülach, canton of Zürich, Switzerland. The observatory provides infrastructure for guided tours, classes and astronomical meetings. At the heart of the spacious roof terrace is the big "twin telescope" with mirror diameters of 85 and 50 cm. The '85 is a pure Cassegrain telescope with a focal length of 7.8 m. The other telescope can be converted from Cassegrain in Newton configuration, the focal length is from 10 to 15 m (Cassegrain) and 2.5 m (Newton). In this arrangement, the Bülacher telescope is unique in Switzerland in its design.

Excerpt from the Wikipedia article Bülach Observatory (License: CC BY-SA 3.0, Authors, Images).

Bülach Observatory
Sternwarteweg,

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Latitude Longitude
N 47.51955 ° E 8.57065 °
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Sternwarte Bülach

Sternwarteweg 7
8180
Zurich, Switzerland
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sternwartebuelach.ch

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Sternwarte Bülach
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Töss (river)
Töss (river)

The Töss is a river of the canton of Zürich. It starts with the confluence of the Vordertöss and the Hindertöss in the Zürcher Oberland, at Tössscheidi on 796 metres (2,612 ft) on the border between the municipalities of Wald west of the Dägelschberg (1,267 m (4,157 ft)), east of the Hüttchopf (1,231 m (4,039 ft)), and north of the Tössstock (1,153 m (3,783 ft))). The Vordertöss (lit.: 'Front Töss') rises on the south side of the Tössstock on the north faces of the Schwarzeberg (1,293 m (4,242 ft)) and Höchhand (1,314 m (4,311 ft)) before it circumvent the Tössstock on its western flank. The larger tributary, the Hindertöss (lit.: 'Back Töss') collects the waters, either, by its tributary, the Chreuelbach, below the Höchhand, the western faces of the Habrütispitz (1,274 m (4,180 ft)) and Rossegg (1,254 m (4,114 ft)), or, from its own sources below Schindelegg (1,265 m (4,150 ft)), and the south faces of Schindelberghöchi (1,234 m (4,049 ft)) and the Dägelschberg, and passes the Tössstock on its northern hillside. The Töss flows to the north before it meets the main valley of its own name, Töss Valley (Tösstal) just before Steg im Tösstal. Here, the river and its valley turns to the west in order to flow through Bauma then turns to the north again. West of the village Turbenthal it turns west again, and the valley gets even more ragged than before. It traverses Winterthur on its most western part of the city, just northeast of the Töss, a city mountain. After joining the Eulach on the western exit of the city, the river Töss then continues more or less westnorthwestern and joins the Rhine after about 11 kilometres (6.8 mi) on Rhine's large southern bend called Tössegg west of Teufen and just before Eglisau.