Abrams Event Address: Addressing Events in a Moving Four-Dimensional Universe

In physics and systems engineering, an event is a physical occurrence or state at a specific point in three-dimensional space and one-dimensional time. While modern physics treats space and time as a single four-dimensional structure, navigation, tracking, and archival systems still rely on domain-specific coordinate conventions—terrestrial datums for Earth's surface, celestial frames for deep space, and independent clocks for time. Because everyday maps move with the Earth, locations appear static; in reality, Earth is rotating, orbiting the Sun at roughly 29.78 km/s (67,000 mph), and moving through the Milky Way at roughly 220–230 km/s. Once an event record leaves its local system, defining where it occurred requires explicitly locking down when it happened, on which time scale, on which celestial body, and relative to what reference frame. Stephen Hawking’s 2009 reception for time travelers illustrates this problem: a street address, a calendar date, and a wall-clock time work on Earth's surface through shared human convention, but outside our moving terrestrial frame, those inputs are incomplete. The Abrams Event Address (AEA) unifies seven physical and contextual declarations into a single explicit state record: target celestial body, epoch, atomic time scale, coordinate reference frame, 3D spatial position, frame-relative velocity, and spatial orientation, sealed with a cryptographic integrity digest. The published AEA-STATE/1 specification encodes this single-epoch state into a deterministic 136-byte binary record built on established geodetic, astrometric, and metrological standards, enabling unambiguous event addressing and cross-system state correlation across terrestrial, orbital, and planetary domains.