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Extraterrestrial civilizations could colonize the galaxy even if they don't have starships 5nvklj





Extraterrestrial civilizations could colonize the galaxy even if they don't have starships 9tpt39

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Extraterrestrial civilizations could colonize the galaxy even if they don't have starships

Dragon
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Post by Dragon Fri May 27, 2022 1:24 am

Astronomers have searched for extraterrestrial civilizations in planetary systems for sixty years, to no avail.

In the paper published by International Journal of Astrobiology, Cambridge University Press, and titled "Migrating extraterrestrial civilizations and interstellar colonization: Implications for SETI and SETA," Irina K. Romanovskaya proposes that the search for extraterrestrial intelligence (SETI) may have more chances to become successful when including the search for migrating extraterrestrial civilizations.

For example, extraterrestrial civilizations may leave their home planetary systems when they face existential threats.

One of the ways to do so is to ride free-floating planets.

Free-floating planets can offer space and resources, as well as protection from space radiation, for very large populations embarking on interstellar travel.

It is most likely technically impossible that huge starships, also called world ships, can offer the same.

Extraterrestrial civilizations may also use free-floating planets to send biological or post-biological species to survey interstellar space, stars, and planetary systems, or to establish their colonies in several planetary systems to preserve and expand their civilizations even before they face existential threats at home.


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Extraterrestrial civilizations could colonize the galaxy even if they don't have starships 334pu7m
Dragon
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Post by Dragon Fri May 27, 2022 1:26 am



Rogue Earth-size planet found in Milky Way

A 'free-floating' planet that is not bound to any star has been discovered by astronomers at the University of Warsaw.

The microlensing event used to make the discovery is called OGLE-2016-BLG-1928.


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Extraterrestrial civilizations could colonize the galaxy even if they don't have starships 334pu7m
Dragon
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Extraterrestrial civilizations could colonize the galaxy even if they don't have starships Empty Re: Extraterrestrial civilizations could colonize the galaxy even if they don't have starships

Post by Dragon Fri May 27, 2022 1:30 am



Free-Floating Planets May be More Common Than Stars

Astronomers, including a NASA-funded team member, have discovered a new class of Jupiter-sized planets floating alone in the dark of space, away from the light of a star.

The team believes these lone worlds were probably ejected from developing planetary systems.

The discovery is based on a joint Japan-New Zealand survey that scanned the center of the Milky Way galaxy during 2006 and 2007, revealing evidence for up to 10 free-floating planets roughly the mass of Jupiter.

The isolated orbs, also known as orphan planets, are difficult to spot, and had gone undetected until now.

The newfound planets are located at an average approximate distance of 10,000 to 20,000 light-years from Earth.

The discovery indicates there are many more free-floating Jupiter-mass planets that can't be seen.

The team estimates there are about twice as many of them as stars.

In addition, these worlds are thought to be at least as common as planets that orbit stars.

This would add up to hundreds of billions of lone planets in our Milky Way galaxy alone.


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Extraterrestrial civilizations could colonize the galaxy even if they don't have starships 334pu7m

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