Panspermia

Exporting Terrestrial Life Out of the Solar System with Gravitational Slingshots of Earthgrazing Bodies

By Keith Cowing
Press Release
astro-ph.EP
October 15, 2019
Filed under
Exporting Terrestrial Life Out of the Solar System with Gravitational Slingshots of Earthgrazing Bodies
Earth Grazing Asteroid
SpaceRef

Exporting terrestrial life out of the Solar System requires a process that both embeds microbes in boulders and ejects those boulders out of the Solar System.

We explore the possibility that Earthgrazing long-period comets and interstellar objects could export life from Earth by collecting microbes from the atmosphere and receiving a gravitational slingshot effect from the Earth. We estimate the total number of exportation events over the lifetime of the Earth to be ∼1−10 for long-period comets and ∼1−50 for interstellar objects.

If life existed above an altitude of 100 km, then the number is dramatically increased up to ∼105 exportation events over Earth’s lifetime.

Amir Siraj, Abraham Loeb
(Submitted on 14 Oct 2019)

Comments: 4 pages, 2 figures; submitted for publication
Subjects: Earth and Planetary Astrophysics (astro-ph.EP)
Cite as: arXiv:1910.06414 [astro-ph.EP] (or arXiv:1910.06414v1 [astro-ph.EP] for this version)
Submission history
From: Amir Siraj
[v1] Mon, 14 Oct 2019 20:44:11 UTC (152 KB)
https://arxiv.org/abs/1910.06414
Astrobiology

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