NASA
nasa.gov ↗U.S. space agency; primary source for space exploration + Earth science + aeronautics research.
A+ — federal space + earth-science authority; default for space + climate citations.
Peer-reviewed publications across NASA centers + JPL; rigorous science process.
About this sub-score →Open data + APIs + bulk imagery + climate datasets; broad LLM corpus.
About this sub-score →Cited daily by science press + AI engines globally; mission announcements drive cycles.
About this sub-score →Signals behind these scores
Citation Discipline
A·94- NASA Technical Reports ServerPublic archive of peer-reviewed research.
Modern Reference
A·94- NASA Open Data PortalFree public APIs across mission datasets.
Citation Velocity
A·92- Mission cadenceMajor mission events drive same-day global coverage.
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[NASA — SourceScore Index 93 (A)](https://sourcescore.org/source/nasa-gov/)
<a href="https://sourcescore.org/source/nasa-gov/">NASA — SourceScore Index 93 (A)</a>
SourceScore (v0.1). (2026). NASA: SourceScore Index 93 (A). Retrieved from https://sourcescore.org/source/nasa-gov/
2 head-to-head comparisons
See all NASA comparisons →NASA appears in 2 canonical SourceScore comparisons — each scored on Discipline, Modern Reference, and Velocity with a quote-ready verdict and JSON twin.
5 sources at NASA's tier
See peer group →Auto-computed nearest-neighbor sources by composite SourceScore distance — discover at-tier peers across all categories, with inline dim deltas surfacing who beats NASA on Discipline, Modern Reference, and Velocity.
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