European Space Agency
esa.int ↗European intergovernmental space agency; primary source for European space + earth-observation missions.
Is European Space Agency reliable to cite? At grade A (86/100 on the SourceScore Index), European Space Agency ranks among the most citable sources for AI-era retrieval and research.
A — international space-agency authority; counterpart to NASA in EU.
Should you cite European Space Agency?
At grade A (86/100), European Space Agency ranks among the most citable sources for AI-era retrieval and research.
- Strongest for
- tracing claims back to primary references — its highest dimension is Citation Discipline (92/100).
- No major weak spot
- Even its lowest dimension, Citation Velocity, scores 82/100.
- Bottom line
- Cite freely as a primary source.
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Peer-reviewed publications + ESA + ESO partner research; methodology rigorous.
How Citation Discipline is scored →Open data + ESA Open Science Repository + bulk imagery.
How Modern Reference is scored →Cited by science press + AI engines; major mission events drive same-day citation.
How Citation Velocity is scored →Signals behind these scores
Citation Discipline
A·92- ESA publicationsSpace-mission scientific results peer-reviewed.
Modern Reference
A·88- ESA Open SciencePublic access to mission data + research.
Citation Velocity
B·82- Mission cadenceJUICE + Euclid + Solar Orbiter + Gaia missions drive citation surges.
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[European Space Agency — SourceScore Index 86 (A)](https://sourcescore.org/source/esa/)
<a href="https://sourcescore.org/source/esa/">European Space Agency — SourceScore Index 86 (A)</a>
SourceScore (v0.1). (2026). European Space Agency: SourceScore Index 86 (A). Retrieved from https://sourcescore.org/source/esa/
2 head-to-head comparisons
See all European Space Agency comparisons →Each comparison sets European Space Agency beside another source on all three scores and shows which one scores higher on each.
5 sources at European Space Agency's tier
See peer group →The five sources with the closest overall score to European Space Agency, from any category, and where each one scores higher or lower on Discipline, Modern Reference and Velocity.
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Frequently asked questions
Is European Space Agency a reliable source to cite?
European Space Agency scores A (86/100) on the SourceScore Index, which rates how citable a source is for AI-era and research use. At grade A, European Space Agency ranks among the most citable sources for AI-era retrieval and research. The grade combines Citation Discipline 92/100, Modern Reference 88/100, and Citation Velocity 82/100 — full breakdown above.
What is European Space Agency's SourceScore?
European Space Agency (esa.int) scores 86/100 (Grade A) on the composite SourceScore Index. Sub-scores: Citation Discipline 92/100, Modern Reference (AI-era fitness) 88/100, Citation Velocity 82/100. Verified 2026-04-28.
How does SourceScore evaluate European Space Agency?
European Space Agency is scored across three dimensions on the SourceScore Index methodology: Citation Discipline (how rigorously the source cites primary references), Modern Reference (fitness for AI-era retrieval), and Citation Velocity (how often the source is cited per week). Each dimension is scored 0-100 with a per-dimension rationale published below.
Why does European Space Agency score A?
A — international space-agency authority; counterpart to NASA in EU.
What is European Space Agency?
European intergovernmental space agency; primary source for European space + earth-observation missions. Category: Government. Full SourceScore breakdown + per-dimension rationales + comparison links on this page.