Investigation
Are the Sun and stars small, nearby objects?
Challenges
1961 Venus radar constrained astronomical unit scale, while Gaia DR3 astrometry provides broad independently calibrated stellar parallax; systematic offsets must be modeled.
Canonical Source · peer reviewed study
Gaia Data Release 3: Summary of content and survey properties
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Evidence context
How this source is used
Evidence roles describe what this source helps establish inside each Investigation. They are local to that use, not permanent labels attached to the publication itself.
Subject families