# KOSMA

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Observatory

"Kosma" redirects here. For the Hungarian composer, see [Joseph Kosma](/source/Joseph_Kosma).

For the American social media bill, see [Kids Off Social Media Act](/source/Kids_Off_Social_Media_Act).

KOSMA Alternative names Kölner Observatorium für SubMillimeter Astronomie Location(s) Gornergrat Kulm Hotel, Gornergrat, Valais, Switzerland Coordinates 45°59′04″N 7°47′09″E / 45.9844°N 7.7858°E / 45.9844; 7.7858 Organization University of Bonn University of Cologne Altitude 3,135 m (10,285 ft) First light 1985 Decommissioned 2 June 2010 Telescope style radio telescope Diameter 3 m (9 ft 10 in) Secondary diameter 0.27 m (11 in) Focal length 31.2 m (102 ft 4 in) Website astro.uni-koeln.de/index.php?id=17647 Location of KOSMA Related media on Commons [edit on Wikidata]

The **Kölner Observatorium für SubMillimeter Astronomie** (**KOSMA**) was a [radio telescope](/source/Radio_telescope) for [submillimeter astronomy](/source/Submillimeter_astronomy) located at 3,135 m (10,285 ft) on [Gornergrat](/source/Gornergrat) near [Zermatt](/source/Zermatt) ([Switzerland](/source/Switzerland)). It was operated by I. Physikalisches Institut, [University of Cologne](/source/University_of_Cologne), and Radioastronomisches Institut, [University of Bonn](/source/University_of_Bonn).[1][2]

The telescope had a primary diameter of 3 m (9.8 ft), and a secondary diameter of 0.27 metres (0.89 ft). It was equipped with [heterodyne](/source/Heterodyne) receivers covering 210 to 820 GHz, corresponding to wavelengths between 0.35 and 1.4 mm, for observations of lines from the [interstellar medium](/source/Interstellar_medium).[2]

Because of the good climatic conditions at the altitude of 3135 m (10285 ft), astronomical observatories have been located in both towers of the [Kulmhotel](/source/Gornergrat_Kulm_Hotel) at Gornergrat since 1967. In 1985, the KOSMA telescope was installed in the southern tower by the Universität zu Köln and, in the course of 1995, replaced by a new dish and mount. In the northern tower, a 1.5 m infrared telescope was operated until 2005 by an Italian association of universities ([TIRGO](/source/Gornergrat_Infrared_Telescope)).

In 2010, the telescope was moved to a site in [Yangbajain](/source/Yangbajain) in [Damxung County](/source/Damxung_County) in [Tibet](/source/Tibet) at an altitude of 4300m and renamed CCOSMA.[3]

## See also

- The [James Clerk Maxwell submillimeter telescope](/source/James_Clerk_Maxwell_Telescope)

- The [California Submillimeter Observatory](/source/California_Submillimeter_Observatory)

- [Science and technology in Switzerland](/source/Science_and_technology_in_Switzerland)

## References

Wikimedia Commons has media related to [KOSMA](https://commons.wikimedia.org/wiki/Category:KOSMA).

1. **[^](#cite_ref-koeln_1-0)** ["Astro: KOSMA"](https://astro.uni-koeln.de/index.php?id=17647). *astro.uni-koeln.de*. Retrieved 27 April 2020.

1. ^ [***a***](#cite_ref-tech_2-0) [***b***](#cite_ref-tech_2-1) ["Technical Details of the KOSMA telescope (2000)"](https://zeus.ph1.uni-koeln.de/node/310). Retrieved 27 April 2020.[*[permanent dead link](https://en.wikipedia.org/wiki/Wikipedia:Link_rot)*]

1. **[^](#cite_ref-ccosma_3-0)** ["CCOSMA----National Astronomical Observatories, Chinese Academy of Sciences"](http://english.nao.cas.cn/Research2015/rp2015/201701/t20170120_173615.html). *english.nao.cas.cn*. Retrieved 27 April 2020.

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