# Habitability properties of circumbinary planets

## TL;DR

This paper argues that circumbinary planets naturally fulfill many habitability conditions, making them prime candidates for life, and suggests that Earth's life is an outlier in this context.

## Contribution

It introduces the idea that circumbinary planets inherently meet multiple habitability criteria, providing a new perspective on potential locations for life beyond Earth.

## Key findings

- Circumbinary planets automatically satisfy at least seven habitability conditions.
- Most biopolymer production in the galaxy likely occurs on circumbinary planets.
- Earth's habitability conditions are fulfilled only by chance, making it an outlier.

## Abstract

It is shown that several habitability conditions (in fact, at least seven such conditions) appear to be fulfilled automatically by circumbinary planets of main-sequence stars (CBP-MS), whereas on Earth these conditions are fulfilled only by chance. Therefore, it looks natural that most of the production of replicating biopolymers in the Galaxy is concentrated on particular classes of CBP-MS, and life on Earth is an outlier, in this sense. In this scenario, Lathe's mechanism for the tidal "chain reaction" abiogenesis on Earth is favored as generic for CBP-MS, due to photo-tidal synchronization inherent to them. Problems with this scenario are discussed in detail.