Company lists · Data refreshed September 2026
Top 25 Astronomy observatories worldwide
RevenueBase identified 601 astronomy observatories worldwide as of September 2026 and tracks 12,773 professional contacts across them, including 2,542 with verified work emails. The United States is the largest market and Pune the largest hub.
This list covers astronomy observatories worldwide, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 19, 2026. Country and city lists for astronomy observatories follow the table.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest astronomy observatories worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 970 contacts → | ||||
Indirect evidence “Pontificia Universidad Católica de Chile.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 2 | 812 contacts → | ||||
Partial evidence “ESO, the European Southern Observatory, is the foremost intergovernmental astronomy organisation in Europe and the world's most productive astronomical observatory.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 3 | 474 contacts → | ||||
Indirect evidence “L’Istituto Nazionale di Astrofisica è il principale Ente di Ricerca italiano per lo studio dell’Universo.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 4 | 389 contacts → | ||||
Indirect evidence “Établissement public d'enseignement supérieur et de recherche.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 5 | 335 contacts → | ||||
Partial evidence “ASTRON is the Netherlands Institute for Radio Astronomy.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 6 | 242 contacts → | ||||
Partial evidence “Astronomical Research and Development” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 7 | 235 contacts → | ||||
Indirect evidence “The National Observatory of Athens (NOA) was founded in 1842 and is the oldest research foundation in Greece.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 8 | 188 contacts → | ||||
Partial evidence “The National Astronomical Observatory of Japan (NAOJ) is the national center of astronomical research in Japan.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 9 | 153 contacts → | ||||
Indirect evidence “Si l’Observatoire de la Côte d’Azur (OCA) possède un patrimoine architectural et scientifique remarquable, ouvert au public, il n’en est pas moins un opérateur de recherche en…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 10 | 152 contacts → | ||||
Partial evidence “The Association of Universities for Research in Astronomy (AURA) is a consortium of 47 US institutions and 3 international affiliates that operates world-class astronomical…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 11 | 130 contacts → | ||||
Indirect evidence “From our home on Earth, we look out into the distances and strive to imagine the sort of world into which we were born.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 12 | 115 contacts → | ||||
Partial evidence “National Astronomical Research Institute of Thailand or NARIT is a research institute under the Ministry of Higher Education, Science, Research and Innovation.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 13 | 82 contacts → | ||||
Partial evidence “De la conception des instruments d’astronomie à l’exploitation des résultats, les thématiques scientifiques développées au LIRA couvrent de nombreux domaines de l’astrophysique.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 14 | 74 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 15 | 71 contacts → | ||||
Indirect evidence “The Thirty Meter Telescope (TMT) International Observatory (TIO) is an extraordinary international scientific endeavor that has the potential to revolutionize our understanding of…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 16 | 70 contacts → | ||||
Partial evidence “The International Centre for Radio Astronomy Research (ICRAR) discovers the hidden Universe through world-class astronomical research.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 17 | 69 contacts → | ||||
Partial evidence “As a national research institute for astronomy since 1974, KASI has conducted research activities, in particular, by developing, establishing, and operating medium- and…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 18 | 54 contacts → | ||||
Partial evidence “The IAU is the international astronomical organization that brings together more than active professional astronomers from more than 100 countries worldwide.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 19 | 52 contacts → | ||||
Indirect evidence “The Gran Telescopio Canarias (GTC or GRANTECAN) is the largest optical-IR telescope in operation.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 20 | 51 contacts → | ||||
Strong evidence “Las Cumbres Observatory is building a global network of astronomical observatories for educational outreach and scientific research.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 21 | 49 contacts → | ||||
Indirect evidence “Tartu Observatory is an institute of the Faculty of Science and Technology of the University of Tartu.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 22 | 47 contacts → | ||||
Partial evidence “O Instituto de Astronomia, Geofísica e Ciências Atmosféricas (IAG) da Universidade de São Paulo (USP) é um dos principais polos de pesquisa do Brasil nas áreas de Ciências Exatas…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 23 | 46 contacts → | ||||
Partial evidence “Sybilla Technologies designs, builds, and operates robotic optical observatories for monitoring objects in space.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 24 | 42 contacts → | ||||
Indirect evidence “UNISTELLAR reinvents the telescope so that everyone can enjoy discovering and understanding the Universe.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 25 | 42 contacts → | ||||
Indirect evidence “Museo Interactivo Mirador” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: astronomy observatories. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names astronomy observatories.
- Partial evidence
- Its own public description names part of astronomy observatories, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name astronomy observatories. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 25 of 601 astronomy observatories worldwide
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Astronomy observatories worldwide at a glance
As of Sep 19, 2026Companies by employee count
Email recency is reported on each country list linked below.
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among astronomy observatories, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
- Coverage
- Every country. Country and city lists for astronomy observatories are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “astronomy observatories”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names astronomy observatories), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among astronomy observatories, and records with no verified work email.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every listed company carries at least one verified work email, 2,542 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 19, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Astronomy observatories by location
2 lists · largest firstEvery Astronomy observatories list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names astronomy observatories, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many astronomy observatories are there worldwide?
RevenueBase identified 601 astronomy observatories worldwide as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
PUC, headquartered in Worldwide, tops this list with the largest team on record.
Which country has the most astronomy observatories?
The United States leads with 128 companies, followed by France (43). Every astronomy observatories list by country and city is linked on this page.
Which city has the most astronomy observatories?
Pune leads with 11 headquartered companies, followed by Tucson (10) and Cambridge (8).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 2,542 verified decision-maker contacts tracked across these 601 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 19, 2026.
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About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.