Black Sun: Ocular Invisibility of Relativistic Luminous Astrophysical Bodies

TL;DR

This paper explores how relativistic motion can cause luminous astrophysical bodies to become invisible to the human eye by shifting their emitted light beyond visible wavelengths, analyzing the distance and velocity conditions for this effect.

Contribution

It introduces a method to calculate the distance at which a luminous astrophysical body becomes invisible due to relativistic Doppler shifting.

Findings

Relativistic Doppler effect can render LABs invisible to human eyes.

Proper distance for invisibility depends on relativistic velocity.

The paper provides formulas linking velocity and distance for ocular invisibility.

Abstract

The relativistic Doppler shifting of visible electromagnetic radiation to beyond the human ocular range reduces the incident radiance of the source. Consequently, luminous astrophysical bodies (LABs) can be rendered invisible with sufficient relativistic motion. This paper determines the proper distance as a function of relativistic velocity at which a luminous object attains ocular invisibility.