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AsteriaStar
Atlas overlay

Observation Conditions Overlay

A layer showing which part of the sky is above the horizon for an observer at a given place and time. Computed from the observer's location and the clock — no observing conditions are assumed or invented, and location stays on the device.

Objects & views it draws on

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.