Welcome to Universum.luUniversum · The astronomy portal
The portal / Sources and credits
The resources that make this project possible

Discoveries.
Trusted sources.

Universum uses the catalogues, databases, photographs, software and scientific references listed below. Thank you to the teams and authors who make them available for consultation and reuse.

Data, images and software.

Each resource retains its own terms of reuse. The portal’s selections, conversions, calculations and illustrations are adaptations identified on the relevant pages. The licenses for data, photographs and software apply to their respective elements.

Solar System · NASA Science and NSSDCA

Characteristics of the worlds, diameters, distances and references for the entries.

NASA Science / NASA NSSDCA ; portal text and diagrams: Steve Cimolino.

Factual references; original project diagrams

Methods and references.

The explanations and calculators are based on the references cited in each tool. Stellar ages are model estimates, diameters are calculated from available parameters, and schematic views are identified.

Website creation and AI assistance.

This portal was designed and developed with artificial intelligence assistance under the direction of Steve Cimolino. This assistance contributed to writing, programming and the production or adaptation of some diagrams and visuals.

The astronomical and geographical data come from the cited catalogues and organizations. The portal’s simulation and calculation results are presented with their methods and limitations. Artistic illustrations created for the project are captioned; they do not represent scientific observations.

Logo, covers, books and the project’s own texts: Steve Cimolino / Éditions Les Vieux Livres. To reuse an element of the project, contact the author. The rights and licenses of third-party resources remain with their authors.

Information, errors and liability.

The content is provided for informational and educational purposes. Despite the care taken in its preparation, it may contain errors, omissions or information that has become inaccurate. Its accuracy, completeness and freedom from errors are not guaranteed.

Estimates and simulations depend on the available data and the models used. To the extent permitted by law, the publisher disclaims all liability for the consequences of using the published information, estimates and simulations. This notice does not limit liabilities that cannot legally be excluded.

If you notice an error, an incomplete credit or a license issue, please contact Steve Cimolino through the Contact page, specifying the page and resource concerned. This will allow the report to be reviewed and any necessary corrections or adaptations to be made.

The source link register.

Original links retained in the portal’s pages and datasets. Detailed credits for photographs, lunar features and objects remain available in their entries.

aa.usno.navy.mil · 2 references
academic.oup.com · 1 reference
archive.stsci.edu · 1 reference
arxiv.org · 1 reference
asd.gsfc.nasa.gov · 1 reference
cdsarc.cds.unistra.fr · 1 reference
celestron-site-support-files.s3.us-east-1.amazonaws.com · 1 reference
chandra.si.edu · 1 reference
cie.co.at · 1 reference
commons.wikimedia.org · 52 references
creativecommons.org · 17 references
d3js.org · 1 reference
darts.isas.jaxa.jp · 1 reference
data.worldbank.org · 1 reference
doi.org · 4 references
download.geonames.org · 1 reference
eclipse.gsfc.nasa.gov · 2 references
esahubble.org · 2 references
esdcdoi.esac.esa.int · 1 reference
gea.esac.esa.int · 3 references
github.com · 9 references
heasarc.gsfc.nasa.gov · 1 reference
hepweb.ucsd.edu · 1 reference
iauarchive.eso.org · 1 reference
nssdc.gsfc.nasa.gov · 3 references
opensource.org · 3 references
physics.nist.gov · 1 reference
planetarynames.wr.usgs.gov · 101 references
quickmap.lroc.asu.edu · 1 reference
raw.githubusercontent.com · 1 reference
science.nasa.gov · 116 references
simbad.cds.unistra.fr · 1 reference
ssd.jpl.nasa.gov · 2 references
svs.gsfc.nasa.gov · 2 references
www.celestron.com · 2 references
www.cosmos.esa.int · 1 reference
www.eso.org · 3 references
www.geonames.org · 1 reference
www.isro.gov.in · 1 reference
www.jpl.nasa.gov · 1 reference
www.nasa.gov · 1 reference
www.naturalearthdata.com · 4 references
www.sdss3.org · 1 reference
www.usgs.gov · 1 reference
www.w3.org · 1 reference
www.wikidata.org · 1 reference

Main terms recorded and checked: October 19, 2026.

Go directory QR codes

Generated locally with qrcode-generator 2.0.4. Copyright © 2009 Kazuhiko Arase. MIT licence; notice retained.

Generator source code · Full MIT licence

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Audience measurement and visitor choices · Google Analytics terms · Google privacy policy

Catalogue of 50 telescopes

Optical diameters, nominal focal lengths, types and model names come from Celestron, Sky-Watcher, Bresser and Omegon specifications. Each model links to its manufacturer specification page.

Specifications are factual data; trademarks belong to their owners. Manufacturer photographs and marketing descriptions are not reproduced.

Catalogue and manufacturer specifications · Detailed references for all 50 models