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AstroBiology

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All known planets outside our solar system. Goldilocks.info. SETI Articles. Shells Around Suns May Have Been Built Science News Letter, June 18, 1960, page 389, Astronomy Intelligent beings in another solar system could have hidden their sun by knocking their planets apart and using the pieces to build a hollow ball around their sun.

SETI Articles

Dr. Freeman J. Dyson of the Institute for Advanced Study, Princeton, N. J., says that other civilizations may be millions of years ahead of the earth. A hollow ball built around the sun would solve the space and energy problems. A search for such infrared radiation should be coordinated with, Project Ozma, a program now underway for detecting artificial radio waves from nearby stars, Dr.

Using our own solar system as an example, Dr. To trap the energy, earthlings could knock apart the planet Jupiter and rearrange it as a hollow ball about 10 feet thick with a diameter twice the size of earth's orbit. Dr. Search for Artificial Stellar Sources of Infrared Radiation Freeman John Dyson, Science, Vol. 131, June 3, 1960, pp. 1667-1668. Astrobiological phase transition: towa... [Orig Life Evol Biosph. 2008]

The Fermi Paradox - Wait But Why. PDF: We made a fancy PDF of this post for printing and offline viewing.

The Fermi Paradox - Wait But Why

Buy it here. (Or see a preview.) Everyone feels something when they’re in a really good starry place on a really good starry night and they look up and see this: Some people stick with the traditional, feeling struck by the epic beauty or blown away by the insane scale of the universe. Personally, I go for the old “existential meltdown followed by acting weird for the next half hour.” Physicist Enrico Fermi felt something too—”Where is everybody?”

A really starry sky seems vast—but all we’re looking at is our very local neighborhood. Galaxy image: Nick Risinger When confronted with the topic of stars and galaxies, a question that tantalizes most humans is, “Is there other intelligent life out there?” As many stars as there are in our galaxy (100 – 400 billion), there are roughly an equal number of galaxies in the observable universe—so for every star in the colossal Milky Way, there’s a whole galaxy out there. 1. 2. [1111.6131] The Fermi Paradox, Self-Replicating Probes, and the Interstellar Transportation Bandwidth. The Great Filter. Sept. 15, 1998 by Robin Hanson Humanity seems to have a bright future, i.e., a non-trivial chance of expanding to fill the universe with lasting life.

The Great Filter

But the fact that space near us seems dead now tells us that any given piece of dead matter faces an astronomically low chance of begating such a future. There thus exists a great filter between death and expanding lasting life, and humanity faces the ominous question: how far along this filter are we? Combining standard stories of biologists, astronomers, physicists, and social scientists would lead us to expect a much smaller filter than we observe. Introduction Fermi, Dyson, Hart, Tipler, and others [Finney & Jones, Dyson 66, Hart 75, Tipler 80] have highlighted the relevance to SETI (the search for extraterrestrial intelligence) of the "The Great Silence" [Brin 83] (also known as the Fermi paradox), the fact that extraterrestrials haven't substantially colonized Earth yet.

Life Will Colonize The Data Point The Great Filter.