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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,887 companies indexed · Last updated: today
DirectoryArts, Culture & RecreationCultural & Educational OrganizationsSchwanden (Sigriswil)Stiftung Sternwarte Planetarium SIRIUS
Stiftung Sternwarte Planetarium SIRIUS Logo
Verified· 4 sourcesTrust Score
Summary

About the company

The core activity of SIRIUS is to provide astronomical experiences and knowledge through the operation of an observatory and a planetarium, including the implementation of solar observations, astronomical presentations and 360° fulldome shows.

AI-generated
Offering

Products & services

Industry:Cultural & Educational Organizations
✓ Offered7
Planetarium presentations
Presentations in the dome hall with star projector and full-dome projection, true-to-life simulations of the night sky, live explanations of the Sun, Moon, planets and other astronomical topics.
Observatory guided tours
Guided tours at the observatory with telescope observations of the Moon, planets, star clusters, nebulae and galaxies, plus explanations of the current night sky.
School presentations
Presentations for grades 1–2, 3–4 and 5–9, as well as telescope guided tours for all levels, as an out-of-school learning venue with live commentary.
Astronomical events
Public events in the annual programme, weekly on Friday and monthly on Saturday and Sunday, with bookable presentations and special evenings.
Astro courses
Astro courses with astronomical content as part of the event offering, complemented by presentations and themed evenings.
Planets trail
Open-access circular route with astronomical information about the solar system, as an educational hike along marked hiking trails in the Bernese Oberland.
Sun observation with a solar instrument
Projection of a solar image into the planetarium dome with a heliostat, view of sunspots and H-alpha observation of prominences without direct risk to the eyes.
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4.5/5

Stiftung Sternwarte Planetarium SIRIUS

Trust & reputation

ranQ Trust Score of Stiftung Sternwarte Planetarium SIRIUS: 4.5 out of 5.0

Trust Score4.5/ 5.0

Excellent

x

Data basis 100% · As of October 2026

Stiftung Sternwarte Planetarium SIRIUS scores 87.1 out of 100 points in the Reputation area of the ranQ Trust Score. This area carries 42% of the weighting.
x
CriterionValueWeight
  • Review quality: The average rating across all connected sources, smoothed against the industry mean. So 5.0 stars from three reviews do not outrank 4.7 from three hundred.77.524%
  • Review volume: The number of reviews across all sources. The scale is logarithmic: the first reviews count the most, and the maximum is reached at 50 reviews.100.010%
  • Review recency: The age of the most recent review. Two-year-old reviews deliberately sit in the middle, because that is normal for Swiss SMEs. Only after three years without a new voice does the value drop markedly.100.08%
Stiftung Sternwarte Planetarium SIRIUS scores 88.6 out of 100 points in the Substance area of the ranQ Trust Score. This area carries 28% of the weighting.
x
CriterionValueWeight
  • Establishment: Years since founding or brand launch, logarithmic. The maximum is reached at 15 years.100.012%
  • Company size: The headcount band, researched by ranQ or stated by the company. It is scored in steps rather than by head count, because the data only provides bands.70.07%
Stiftung Sternwarte Planetarium SIRIUS scores 86.7 out of 100 points in the Identity area of the ranQ Trust Score. This area carries 22% of the weighting.
x
CriterionValueWeight
  • Verification: Official register entry (commercial register with UID or professional-body record, 55 points), confirmed domain (20 points) and confirmed ranQ profile (up to 25 points, depending on completeness).86.722%
Stiftung Sternwarte Planetarium SIRIUS scores 68.6 out of 100 points in the Visibility area of the ranQ Trust Score. This area carries 8% of the weighting.
x
CriterionValueWeight
  • Website authority: Ahrefs' Domain Rating measures, on a scale of 0 to 100, how strongly a website is linked from other websites. For Swiss SMEs the range up to 40 is typical; the maximum is reached at 35.97.14%
  • Media authority: Quality and number of editorial mentions, weighted by the importance of the source, plus the recency of the latest high-quality mention.40.04%
Qualifications+0.00

Stiftung Sternwarte Planetarium SIRIUS reaches a ranQ Trust Score of 4.5 out of 5.0 — rated «Excellent». The rating draws, among other things, on 4.6 out of 5 stars from 51 customer reviews. As of October 2026.

The Trust Score cannot be bought and is calculated from publicly verifiable data.

Reviews

Aggregated rating

Aggregated rating
4.6
of 5

Aggregated from 51 reviews across all connected sources

Sources
GGoogle4.651
★TrustpilotSoon
PProvenExpertSoon

Further sources are added continuously and factored into the ranQ Rating.

Press

Media

December 6, 2025Media
25 Jahre Sternwarte Sirius: Von Demut, schlaflosen Nächten und einer Fahrt nach Jena
bernerzeitung.ch
October 10, 2025Media
Events Thun/Oberland: Hier wird seit 25 Jahren das Weltall erkundet
bernerzeitung.ch
January 1, 2022Media
Sternwarte Sirius Schwanden – Liegt die Zukunft wirklich in den Sternen?
bernerzeitung.ch

Knowledge

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Location

Schwandenstrasse 131
3657 Schwanden (Sigriswil)
Opening hours
Mon
Closed
Tue
Closed
Wed
Closed
Thu
Closed
Fri
18:00 - 23:30
Sat
Closed
Sun
Closed

At a glance

Legal form
Foundation
UID
CHE-113.406.889
Founded
2007 · 19 years
Last commercial register change
September 30, 2024
Employees
11 to 20
Legal form: Graded by liability and disclosure. The weight is kept small: a sole proprietorship is not a dubious company, it is just liable differently.97.06%
  • Branch offices: Branch offices linked in the commercial register. Having none is normal and costs no points.70.03%
    • Full methodology

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