Science Fiction
Dictionary
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
 |
Don't Miss The Planetary Show!
Although none of us would make the mistake of believing in a perfect, immutable version of the heavens ala Ptolemy, I think many of us still think that the solar system has looked just the way it does for many millions of years.
This may not be true. It is possible that the most active bodies in the solar system are performing in a way that is strictly a limited engagement - we should get up there and look more closely.
According to Cuzzi, the sparkle of Saturn's rings suggests that something — perhaps an icy interloper from beyond Neptune or a large moon of Saturn itself — might have broken apart near the planet and formed the rings within the past few hundred million years, less than 10% of the planet's life so far. The brilliance would be fleeting, because the rings would “get duller and duller” over time, says Cuzzi.
Enceladus is a fairy moon. As it orbits Saturn, it sprinkles a glittering trail of ice — the E ring — thanks to watery geysers that shoot from its south pole. But researchers have struggled to explain how it can sustain such activity...
Io harbours hundreds of volcanic features, some of which spew plumes of sulphur and sulphur dioxide 500 kilometres into space — a distance that from Earth would reach further than the International Space Station. But the 90,000 gigawatts of heat released by Io is several times more than would be expected from the simplest models of tidal interactions between the moon and Jupiter. That mismatch suggests that “Io is more volcanically active in some periods than others”, says David Stevenson, a planetary scientist at the California Institute of Technology in Pasadena.
SF Grandmaster Arthur C. Clarke introduced this idea to science fiction readers in his 1968 novel 2001: A Space Odyssey:
As long ago as 1945, a British astronomer had pointed out that the rings were
ephemeral; gravitational forces were at work which would soon destroy them.
Taking this argument backward in time, it therefore followed that they had
been created only recently - a mere two or three million years ago.
But no one had ever given the slightest thought to the curious coincidence
that the rings of Saturn had been born at the same time as the human race.
Be sure to check out this fascinating article in Nature for many more details; thanks to Winchell Chung of Project Rho for pointing this out.
But some planetary scientists say that the rings' resplendence is hard to reconcile with a lifetime lasting billions of years1. The rings' particles are 90% water ice and should darken over time as they are struck by carbonaceous dust shed from comets and asteroids. “If you look at the rings of all the other planets — Jupiter, Uranus and Neptune — those rings are all very dark,” says Jeff Cuzzi, a planetary scientist at Ames. “That's kind of what you'd expect from heavily polluted material.”
For the rings, as had been known since the nineteenth century, were not solid:
that was a mechanical impossibility. They consisted of countless myriads of
fragments - perhaps the remains of a moon that had come too close and had been
torn to pieces by the great planet's tidal pull. Whatever their origin, the
human race was fortunate to have seen such a wonder; it could exist for only a
brief moment of time in the history of the Solar System.
Scroll down for more stories in the same category. (Story submitted 1/27/2013)
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 ")
ESA To Build Moon Bases Brick By Printed LEGO Brick
'We made a crude , small cell and were delighted - and, I admit, somewhat surprised - to find it worked.' - John W. Campbell, 1950.
FLOAT Levitating Train On The Moon ala Clarke
'The low-slung monorail car, straddling its single track, bored through the shadows on a slowly rising course.' - Arthur C. Clarke, 1955.
SpaceX Intros Extravehicular Activity Suit
'Provision had been made to meet the terrific cold which we knew would be encountered the moment we had passed beyond the atmosphere.' - Garrett P. Serviss, 1898.
SpaceX Wants A Moonbase Alpha
'And he had been sent with troops, supplies and bombs to command Russia's most trusted post, the Moonbase.' - L. Ron Hubbard, 1948.
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.
Science Fiction
Timeline
1600-1899
1900-1939
1940's 1950's
1960's 1970's
1980's 1990's
2000's 2010's
Current News
Cognify - A Prison Of The Mind We've Seen Before In SF
'So I serve a hundred years in one day...'
Robot With Human Brain Organoid - 'A Thrilling Story Of Mechanistic Progress'
'A human brain snugly encased in a transparent skull-shaped receptacle.'
Goodness Gracious Me! Google Tries Face Recognition Security
'The actuating mechanism that should have operated by the imprint of her image on the telephoto cell...'
With Mycotecture, We'll Just Grow The Space Habitats We Need
'The only real cost was in the plastic balloon that guided the growth of the coral and enclosed the coral's special air-borne food.'
Can A Swarm Of Deadly Drones Take Out An Aircraft Carrier?
'The border was defended by... a swarm of quasi-independent aerostats.'
WiFi and AI Team Up To See Through Walls
'The pitiless M rays pierced Earth and steel and densest concrete as if they were so much transparent glass...'
Climate Engineering In California Could Make Europe's Heat Waves Worse
'Pina2bo would have to operate full blast for many years to put as much SO2 into the stratosphere as its namesake had done in a few minutes.'
Optimus Robot Will Be A Good Nanny, Says Musk
'Nanny is different,' Tom Fields murmured... 'she's not like a machine. She's like a person.'
ESA To Build Moon Bases Brick By Printed LEGO Brick
'We made a crude , small cell and were delighted - and, I admit, somewhat surprised - to find it worked.'
Does The Shortage Of Human Inputs Limit AI Development?
'...we've promised him a generous pension from the royalties.'
Textiles That Harvest Energy And Store It
'The clothes and jewelery drew their tiny power requirements from her movements.'
LORIS Passive-Gripper Climbing Robot
'At the end of each appendage's eight fingers there are tinier appendages...'
Neuroplatform Human Brain Organoid Bioprocessor Uses Less Electricity
'Cultured brains on a slab.'
Drug To Regenerate Teeth In Humans
'We want to do something to help those who are suffering from tooth loss or absence,' said lead researcher Katsu Takahashi.
Coin-Sized Nuclear Battery Good For 100 Years
'...power pack the size of a pea.'
Live Stream With Meta-Ban Multimodal Smart Glasses
'...the bug-eyed, opaque gape of her True-Vu lenses.'
