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Onoochi, V. (2025) Comment on Work of Umrigara and Anderson “Energy Needed to Propel a Tiny Spacecraft to Proxima Centauri, and, an Unstated Assumption in Einstein’s 1905 Paper”. arXiv:2502.15818v1.

has been cited by the following article:

• TITLE: About the Possibility of Traveling Faster than the Speed of Light

  AUTHORS: Gustavo V. López

  KEYWORDS: Special Relativity, Proper Time, Faster than Speed of Light

  JOURNAL NAME: Journal of Modern Physics, Vol.16 No.7, July 30, 2025

  ABSTRACT: Using the relativistic equation of motion in 1-D, a study is made to see the possibility for a body to travel faster than the speed of light. It is found that neither by external force nor internal force, it is not possible to have a speed-body faster than the speed of light. In addition, an observation is made to respect the so-called proper time of a body. This observation brings about a new definition of the proper time concept.