The Cygnus Bubble And Astroengineering

The Cygnus Bubble PN G75.5+1.7 is a natural feature in the constellation Cygnus; it is a planetary nebula created when a star ejected its outer layers of luminous gas.


(Cygnus Bubble)

As noted in the Daily Galaxy, it provides an interesting opportunity to wonder about the engineering possibilities open to more advanced civilizations.

[Freeman] Dyson's thought experiment suggested that in our search for advanced extraterrrestrial civilizations that Instead of radio signals we should look for spheres, which are artificial mega structures that enclose the orbit of a star, fabricated from the material of that solar system. The key is to distinguish a Dyson sphere from natural dust components. The Dyson sphere is the marker of what Kardashev calls a Type 2 civilization, which is capable of using up all the energy produced by a star. A Type three civilization uses up all the energy produced by a galaxy.

There is a compromise between a mere planet and a full Dyson sphere; a ringworld, described below by Larry Niven from his 1970 Hugo and Nebula award-winning novel Ringworld. An artifact that is a ribbon of matter with a star at it's center, it has over 3 million times as much surface area as the Earth. The ring rotates at 770 miles per second, providing centripetal force of roughly our gravity. What did it look like from the surface?

The Ringworld had no horizon. There was no line where the land curved away from the sky. Rather, earth and sky seemed to merge in a region where details the size of continents would have been mere points, where vanishing point held his eyes fixed.

You might also enjoy this related story Find Extraterrestrial Civilizations By Their Works . Via Daily Galaxy via Atomic Rockets.

Scroll down for more stories in the same category. (Story submitted 3/30/2010)

Follow this kind of news @Technovelgy.

| Email | RSS | Blog It | Stumble | del.icio.us | Digg | Reddit |

Would you like to contribute a story tip? It's easy:
Get the URL of the story, and the related sf author, and add it here.

Comment/Join discussion ( 0 )

Related News Stories - (" Space Tech ")

NASA's Astronaut Rescue Ball
'Ball and closely-prisoned man plummeted downward..' - Doc Smith, 1934.

NASA Asks For Moon To Earth Delivery Ideas
'Authority's 3-g catapult was almost one hundred kilometers long...' - Robert Heinlein, 1966.

Rapid Automated Search For Habitable Planets Needed
'I was near enough it now to set my automatic astronomical instruments to searching it for a habitable planet.' - Edmond Hamilton, 1936.

NASA's Meteorite-Resistant Fabric Perfect For Space Armor
'The men who labored so feverishly there, were clad in heavy space armor...' - Raymond Z. Gallun, 1932.

 

Google
  Web TechNovelgy.com   

Technovelgy (that's tech-novel-gee!) is devoted to the creative science inventions and ideas of sf authors. Look for the Invention Category that interests you, the Glossary, the Invention Timeline, or see what's New.

 

 

 

 

 

Current News

Bat Bot Robotic Flapping-Wing Drone
'The dark birdforms dotted the mountaintops like statues of prehistoric beasts, wings outspread...'

NASA's Astronaut Rescue Ball
'Ball and closely-prisoned man plummeted downward..'

ARM Wants To Build Brain Chips
'Slivers of microsoft, angular fragments of colored silicon...'

Sky Fence - A Drone-Proof Shield Created Over Prison
'There’s still a protective field over the whole thing. It volatilizes anything that tries to get through.'

Geoengineering The Atmosphere For Climate Change
'...a uniform temperature for each degree of latitude the year round.'

Archinaut Orbiting Robotic Factory
'mass-produced only in the orbiting factories...'

Cryonic Preservation - The Last Perk You'll Ever Need
'Is there not also a law providing for voluntary suspension of animation?'

Computers Understand Humans By Watching And Modeling Them
Soon, your computer will be watching you... and judging you.

NASA Asks For Moon To Earth Delivery Ideas
'Authority's 3-g catapult was almost one hundred kilometers long...'

Musk Tunnels Wisely Restrict Drivers
Too many robots.

Robot Swarms Controlled With Augmented Reality
'You're not thinking in enough dimensions...'

MIT's C-LEARN Helps Robots Transfer Learning To Other Robots
'Talk Between Robots radio...'

Mini-Brains In A Dish
'Cultured brains on a slab.'

Rapid Automated Search For Habitable Planets Needed
'I was near enough it now to set my automatic astronomical instruments to searching it for a habitable planet.'

WatchSense Perfect For Fat-Fingered Smartwatch Owners
'Now all you had to do was wave your hand in the general direction of the components...'

Digital Construction Platform Robot 3D Prints A Building
'It extrudes material like a spider.'

More SF in the News Stories

More Beyond Technovelgy science news stories

Home | Glossary | Invention Timeline | Category | New | Contact Us | FAQ | Advertise |
Technovelgy.com - where science meets fiction™

Copyright© Technovelgy LLC; all rights reserved.