Pseudo-panspermia

The theory first asserts that many of the small organic molecules used for life originated in space (for example, being incorporated in the solar nebula, from which the planets condensed).

Pseudo-panspermia differs from the fringe theory of panspermia, which asserts that life arrived on Earth from distant planets.

[4] The dust plays a critical role of shielding the molecules from the ionizing effect of ultraviolet radiation emitted by stars.

[5] The Murchison meteorite contains the organic molecules uracil and xanthine,[6][7] which must therefore already have been present in the early Solar System, where they could have played a role in the origin of life.

[8] Nitriles, key molecular precursors of the RNA World scenario, are among the most abundant chemical families in the universe and have been found in molecular clouds in the center of the Milky Way, protostars of different masses, meteorites and comets, and also in the atmosphere of Titan, the largest moon of Saturn.

Some stages in the origin of life are well-understood, such as the habitable Earth and the abiotic synthesis of simple molecules, whether in space or on Earth. Later stages remain more speculative. [ 2 ]