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AsteriaStar
Discovery methodology

Theory & Observation

The interplay between prediction and measurement that drives astronomy forward — sometimes theory leads and observation confirms (the prediction of Neptune, of gravitational waves), and sometimes observation surprises and theory must catch up (the accelerating universe).

Across the history of discovery

Knowledge connections

Sources

The primary and reference sources this topic draws on.

  • NASANational Aeronautics and Space Administration

    Mission data, planetary science, space telescopes, and public-domain imagery.

    Most NASA-produced imagery is in the public domain; individual items are checked for usage terms before publication.