The exoplanets analogy to the Multiverse

TL;DR

This paper draws an analogy between the Multiverse and a hypothetical Multiplanetverse, suggesting that fine-tuning of Earth and the Sun implies the existence of numerous exoplanets, offering predictive insights without direct evidence.

Contribution

It introduces the concept of a Multiplanetverse as an analogy to the Multiverse, proposing that fine-tuning arguments can predict exoplanets before direct detection.

Findings

Fine-tuning of Earth suggests exoplanets exist.

The analogy provides predictive power for exoplanets.

Theories claiming Earth is unique are misguided.

Abstract

The idea of a Mutiverse is controversial, although it is a natural possible solution to particle physics and cosmological fine-tuning problems (FTPs). Here I explore the analogy between the Multiverse proposal and the proposal that there exist an infinite number of stellar systems with planets in a flat Universe, the Multiplanetverse. Although the measure problem is present in this scenario, the idea of a Multiplanetverse has predictive power, even in the absence of direct evidence for exoplanets that appeared since the 90s. We argue that the fine-tuning of Earth to life (and not only the fine-tuning of life to Earth) could predict with certainty the existence of exoplanets decades or even centuries before that direct evidence. Several other predictions can be made by studying only the Earth and the Sun, without any information about stars. The analogy also shows that theories that defend that the Earth is the unique existing planet and that, at the same time, is fine-tuned to life by pure chance (or pure physical necessity from a parameter free Theory of Everything) are misguided, and alike opinions about our Universe are similarly delusional.