Tether Asteroids To Save Us All

Lots of schemes have been suggested to for planetary defense from errant asteroids (like NASA's Asteroid Redirect Mission), but here's a new one:


(Small asteroid tugs big)

Every year near-Earth object (NEO) surveys discover hundreds of new asteroids, including the potentially hazardous asteroids (PHA). The possibility of impact with the Earth is one of the main motivations to track and study these objects.

This paper presents a tether assisted methodology to deflect a PHA by connecting a smaller asteroid, altering the center of mass of the system, and consequently, moving the PHA to a safer orbit. Some of the advantages of this method are that it does not result in fragmentation, which could lead to another problem, and also the flexibility to change the configuration of the system to optimize the deflection according to the warning time.

The dynamics of the PHA-tether-asteroid system is analyzed, and the amount of orbit change is determined for several initial conditions. Only motion in the plane of the orbit of the PHA around the Sun is considered, thus the PHA chosen for the simulations has low orbit inclination.

Analysis of the dynamics of the system shows that the method is feasible for planetary defense.

(Via Dynamics of tethered asteroid systems to support planetary defense)

Science fiction writers have been thinking about moving asteroids for generations. In his playful, tongue-firmly-in-cheek 1958nstory And Then the Town Took Off, Richard Wilson describes the creation of a new planet - from the asteroids:

Magnology is safe, stressless, and permanently powerful in stasis. It is the ultimate in gravity-beam nullification. If anything can glue the asteroids back into the planet they once were, magnology will do it.
Read more about building a planet with asteroids)

Robert Heinlein's 1939 story Misfit featured the movement of a selected asteroid to an ideal location for a base. Using a ballistic calculator

"Now about our job -- We didn't get one of the easy repair-and-recondition jobs on the Moon, with week-ends at Luna City, and all the comforts of home. Nor did we draw a high gravity planet where a man can eat a full meal and expect to keep it down. Instead we've got to go out to Asteroid HS-5388 and turn it into Space Station E-M3. She has no atmosphere at all, and only about two per cent Earth-surface gravity..."

[Asteroid] Eighty-eight swung some millions of miles further around the sun. The pock-marks on her face grew deeper, and were lined with durite, that strange close-packed laboratory product which (usually) would confine even atomic disintegration. Then Eighty-eight received a series of gentle pats, always on the side headed along her course. In a few weeks' time the rocket blasts had their effect and Eighty-eight was plunging in an orbit toward the sun.
(Read more about moving an asteroid)

Tethers have a long and interesting history in space travel; see Electrodynamic Tethers: Clean Up Debris - Power or Boost Spacecraft to learn more.

Scroll down for more stories in the same category. (Story submitted 6/21/2020)

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 ")

Capture Asteroids In A Bag
'... just as a small boy catches a swift ball in his cap.' - VE Thiessen, 1947.

Space 'Hurricane' Has Been Seen
'... it was the biggest of the four hundred odd storms raging in the Fifty Suns region.' - AE van Vogt, 1943.

Sole Morphing Astronaut Boots - A New Pair Of Moon Boots?
'Itís an ideal device for kangarooing along in lunar gravity.' - James P. Hogan, 1977.

Mercury Capsule Ablative Shielding
'...a synthetic which air-friction would erode away.' - Doc Smith, 1934.

 

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

SpaceX Requests Starlink For Starship
'... sweating, heat-blistered engineers at every interplanetary radiograph station on three planets.'

SF Writers Predicted John Deere Autonomous Tractors
'The huge plow... seemed to shake itself - and began to move back southward.'

DARPA Funding AI Fighter Pilots
'Cultured brains on a slab.'

StoryFile To Help William Shatner Become Landru
"I am Landru. I am he! All that he was, I am."

Telehealth Drones To The Rescue
'A shadow passed over him, and he looked up.'

Capture Asteroids In A Bag
'... just as a small boy catches a swift ball in his cap.'

Sony Pocket Air Conditioner Is Phil Dick's Idea!
'... he went to the hall closet to get his pith helmet and his mandatory cooling-unit.'

Is It Possible To GROW Planes And Vehicles?
'These are your rudimentary seed packages...'

Guard Dog Robot Security Check
'We still use people at the main gates, but here it's an automated sentry.'

Sheepskin Parchment Helped Medieval Lawyers Prevent Fraud
'The single sheet he held, and even the words and signatures upon it, were all integral parts of a single giant molecule...'

Space 'Hurricane' Has Been Seen
'... it was the biggest of the four hundred odd storms raging in the Fifty Suns region.'

PR2 Fencing Robot Perfect For Kwisatz Haderach-in-training
'Now, we'll work on your timing. Let me see you catch that thing sinister.'

Sole Morphing Astronaut Boots - A New Pair Of Moon Boots?
'Itís an ideal device for kangarooing along in lunar gravity.'

Mice Gestate In Mechanical Womb
'... in the Decanting Room, the newly-unbottled babes uttered their first yell of horror and amazement.'

3rd Century BC Gold Bee Is Just The Start
Bees knees, I order you to freeze!

Worlds With Underground Oceans More Conducive To Life
'There is life on Europa.'

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.