Cross-Scale Analogies between Astrophysics and Human Biology: Conceptual and Technological Parallels in the Study of Complex Systems

Over recent decades, our understanding of the universe and the microscopic world has advanced remarkably. The rise of modern science, supported by the evolution of observational instruments, such as the Hubble Space Telescope and the James Webb Space Telescope for cosmic exploration, and next-generation microscopes for the study of living systems, has led to major discoveries. Since the invention of the telescope, astronomers have progressively unveiled the structure and dynamics of the universe, laying the foundations of astrophysics. At the same time, advances in microscopy have made it possible to explore the infinitely small, revealing the fundamental mechanisms of the human body and establishing the basis of physiology and molecular biology.

Nanotechnology has enhanced the performance of telescopes and revolutionized medical care, particularly in targeted therapies and regenerative medicine.

At first glance, the scales that characterize the biological world and those governing the observable universe appear fundamentally disconnected. On one hand, molecular biology investigates a microscopic universe, composed of cells, proteins, and subcellular structures, where distances are measured in nanometers or even smaller fractions expressed in negative powers of ten. On the other hand, astrophysics deals with objects and structures whose dimensions extend across light-years, parsecs, and megaparsecs, corresponding to extreme positive orders of magnitude.

The complexity of the human body, like that of the universe, engages the soul, the mind, and reason simultaneously. Images produced by telescopes or microscopes, beyond their strictly scientific value, possess an aesthetic, artistic, and soothing dimension that stimulates intellectual curiosity. They invite us to search for analogies that go beyond mere visual resemblance. And when such analogies emerge, they inspire a sense of wonder: how can such convergence exist, on different levels, between two disciplines that appear so fundamentally opposed?

This article aims to examine in detail these two domains, the universe and the human body, considered among the most complex natural systems known to date. The objective is to identify potential analogies, whether numerical, historical, visual, morphological, structural, or technological, and to assess the extent to which transfers of concepts or methods between these fields may be conceivable. Such a comparison, rarely addressed in the scientific literature, raises fundamental questions about the nature of complex structures and the laws that govern them.

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The authors declare no conflict of interest.

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The datasets used in this study are openly available at [repository link] and the source code is available on GitHub at [GitHub link].

This work did not receive any external funding.