# Sudbury Neutrino Observatory

> underground laboratory in Ontario, Canada

**Wikidata**: [Q176822](https://www.wikidata.org/wiki/Q176822)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Sudbury_Neutrino_Observatory)  
**Source**: https://4ort.xyz/entity/sudbury-neutrino-observatory

## Summary
The Sudbury Neutrino Observatory (SNO) is an underground neutrino detector and research laboratory located near Greater Sudbury in Ontario, Canada. It operated as a neutrino experiment and observatory beginning in May 1999 and was retired on 28 November 2006; the facility has been succeeded by the SNO+ project.

## Key Facts
- Instance: neutrino detector, neutrino experiment, research institute, and observatory.
- Location: Greater Sudbury area, Ontario, Canada; coordinates 46.466666666667° N, −81.172777777778° W.
- Operational period: entered service May 1999; service retirement 28 November 2006.
- Successor: replaced by SNO+.
- Affiliation: part of the SuperNova Early Warning System (SNEWS).
- Country: Canada.
- Alternate names/aliases: SNO, Sudbury Neutrino Observatory, サドベリー・ニュートリノ天文台.
- Official website: http://www.sno.phy.queensu.ca/ (English).
- Identifiers: ISNI 0000 0001 0488 5078; VIAF ID 157064419; GND ID 1185776923; Freebase ID /m/071gq; Library of Congress authority no2002014591.
- Minor Planet Center observatory code: 817.

## FAQs
### Q: What is the Sudbury Neutrino Observatory?
A: The Sudbury Neutrino Observatory (SNO) is an underground neutrino detector and research laboratory in Ontario, Canada, configured as a neutrino experiment and observatory.

### Q: Where and when did SNO operate?
A: SNO was located near Greater Sudbury, Ontario (coordinates 46.466666666667° N, −81.172777777778° W). It entered service in May 1999 and its service was retired on 28 November 2006.

### Q: What succeeded the Sudbury Neutrino Observatory?
A: The original SNO experiment and facility were replaced by the SNO+ project.

### Q: Is SNO connected to any international alert systems?
A: Yes. SNO was part of the SuperNova Early Warning System (SNEWS).

## Why It Matters
The Sudbury Neutrino Observatory served as a dedicated underground facility for neutrino detection and experimentation. As an underground observatory and research institute, it provided infrastructure specialized for neutrino experiments and for participating in coordinated observation efforts, such as the SuperNova Early Warning System. Its operation established a site-specific continuity in neutrino research by later transitioning to the successor project SNO+. The combination of precise geographic placement in Greater Sudbury, documented operational dates, and multiple library and authority identifiers makes SNO a well-documented node in the network of international neutrino research facilities and observatory infrastructure. Researchers, data archivists, and institutions reference SNO through established identifiers and its maintained online presence.

## Notable For
- Being an underground neutrino detector and experiment located near Greater Sudbury, Ontario, Canada.
- Entering service in May 1999 and having a documented service retirement on 28 November 2006.
- Serving as part of the SuperNova Early Warning System (SNEWS).
- Having a direct successor project, SNO+.
- Possessing multiple international authority identifiers (ISNI, VIAF, GND, LOC) and a Minor Planet Center observatory code (817).

## Body

### Overview
- Name: Sudbury Neutrino Observatory (SNO).
- Aliases: SNO; サドベリー・ニュートリノ天文台.
- Named after: Greater Sudbury.
- Wikimedia Commons image: https://commons.wikimedia.org/wiki/Special:FilePath/SNOLAB_2014-03-21.jpg.
- Commons category: Sudbury Neutrino Observatory.

### Location and geography
- Country: Canada.
- Province/region: Ontario.
- Coordinates: latitude 46.466666666667, longitude −81.172777777778.

### Classification and purpose
- Instance of: neutrino detector; neutrino experiment; research institute; observatory.
- Role: facility for neutrino detection and related research activities; participant in coordinated observatory networks (SNEWS).

### Operational history
- Service entry: May 1999 (service_entry: 1999-05-00).
- Service retirement: 28 November 2006.
- Successor project: SNO+ (replaced_by: SNO+).

### Affiliations and networks
- Part of: SuperNova Early Warning System (SNEWS).
- Minor Planet Center observatory code: 817.

### Identifiers and authority data
- ISNI: 0000000104885078.
- VIAF ID: 157064419.
- GND ID: 1185776923.
- Freebase ID: /m/071gq.
- Library of Congress authority ID: no2002014591.
- Canadiana name authority ID: ncf10567109.
- Microsoft Academic ID (discontinued): 2780353299.
- Yale LUX ID: group/2ef0dfa4-56bd-4655-9b08-dfbece678192.
- Encyclopædia Britannica Online ID: topic/Sudbury-Neutrino-Observatory.

### Online presence and documentation
- Official website: http://www.sno.phy.queensu.ca/ (English).
- Wikipedia title: Sudbury Neutrino Observatory.
- Wikipedia language links: ar, commons, de, en, fr, hu, id, it, ja, nl.
- Sitelink count: 17.

### Catalog and reference entries
- Gran Enciclopèdia Catalana ID: sudbury-neutrino-observatory (also former scheme 0246914).
- Atlas Obscura place ID: sudbury-neutrino-observatory.
- Encyclopædia Britannica entry label: Sudbury Neutrino Observatory (P1810 qualifier).

### Notes
- All factual statements in this entry derive from the provided structured properties and identifiers for the Sudbury Neutrino Observatory.

## References

1. Virtual International Authority File
2. Freebase Data Dumps. 2013