If you try to travel near the speed of light, the vacuum of space turns into a wall of heat that would melt any material we know of.
April 2, 2026
Original Paper
Analytical Scaling of Relativistic Drag in the Interstellar Medium
arXiv · 2604.00041
The Takeaway
While space is mostly empty, this paper calculates that at relativistic speeds, the tiny amount of hydrogen gas in the void hits a ship so hard it creates an 'incinerator' effect. This 'Magnitude Paradox' means that while physics allows you to keep your speed, the friction of 'nothingness' generates heat that no passive material can survive.
From the abstract
This paper develops an analytical framework for the retarding forces on macroscopic spherical probes travelling through the interstellar medium (ISM) at relativistic speeds (0.1c to 0.99c). Integrating the aberrated momentum flux of both baryonic and radiative fields yields scaling laws that expose what this work calls the Magnitude Paradox: relativistic inertia (gamma^3) keeps a probe's speed nearly constant across parsec-scale distances, yet the same gamma^2 boost to the effective baryonic cro