First Asteroid Belt Found Around Star Like Our Sun
An asteroid belt may have been found surrounding a star much like our own Sun, according to Dr. Charles Beichman of CIT. His team used NASA's Spitzer Space Telescope to make the discovery. If confirmed, this would be the first asteroid belt detected around a star that is about the same age and size as our Sun. If true, it could offer a rare look at a star system that closely resembles our own.
(From Star HD 69830 Zodiacal Disk Spectrum)
The graph of data shown above shows the the dust around the nearby (about 41 light years) star HD 69830 has a composition that is very similar to that of the recent comet Hale-Bopp. The hills and valleys seen in the data demonstrate the presence of various minerals. These spectra show that a silicate mineral called olivine (in this case, forsterite - see inset box) is present. This mineral is found on Earth - and in comets and asteroids.
(From Star HD 69830 Asteroid Belt (artist concept))
The above artist's conception of the system shows the view from a planet that might exist in the system. Note the asteroid collision in the foreground - this replenishes the dust detected by the Spitzer telescope.
Science fiction writers like Larry Niven and Jerry Pournelle assumed that other stars would also have asteroid belts. In their excellent novel The Mote In God's Eye, they wrote about an alien civilization that had expanded into space to colonize (and move) the asteroids into the stable Trojan points of a large gas giant planet. ("Trojan points" are points sixty degrees ahead of and sixty degrees behind a large planet; a zone of stable equilibrium is created in which space rubble accumulates.)
"Either this whole system is cluttered with asteroids from edge to edge or there is a new principle at work. There's more junk in Mote Beta's Trojans than has ever been reported in another system."
As it turned out, the asteroids in the Trojan points were inhabited; the Moties had moved asteroids from throughout their system. There is no word from Dr. Beichman and his colleagues about (possibly inhabited) Trojan points.
However, a second theory (somewhat less likely) will need to be checked out. According to the astronomers, it is possible that a giant comet, as big as the planet Pluto, got knocked into the inner solar system and is slowly boiling away, shedding dust in the process. "The 'super comet' theory is more of a long shot," Beichman said, "but we'll know soon enough." Future observations of the star using Spitzer and ground-based telescopes are expected to conclude whether asteroids or comets are the source of the dust.
Science fiction writers also have the "super comet" possibility covered. In his dated (but still cool) 1936 novel The Cometeers, Jack Williamson writes about a "comet" that is twelve million miles long! As it turns out, it wasn't a comet, but that's another story entirely.
Read more about the Alien Asteroid Belt press release; see more Alien Asteroid Belt images and videos.
Scroll down for more stories in the same category. (Story submitted 4/21/2005)
Follow this kind of news @Technovelgy.
| Email | RSS | Blog It | Stumble | del.icio.us | Digg | Reddit |
you like to contribute a story tip?
Get the URL of the story, and the related sf author, and add
Comment/Join discussion ( 1 )
Related News Stories -
Pent-Up NASA Scientists Simulate Life On Mars
'That gives it complete isolation.' - David H. Keller, 1932.
Dust Movement On The Moon, Saturn's Rings Solved
'...The dust normally on the surface picks up and keeps a charge.' - Hal Clement, 1956.
Axiom - The World's First Private Space Station?
'So Webb Foster had built his space laboratory... It was a great crystal sphere, a thousand feet in diameter.' - Nat Schachner, 1937.
Moon's Huge Lava Tubes Perfect For Heinlein's Bat Wings
'It's just a big volcanic bubble, two miles across...' - Robert Heinlein, 1957.
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.
Matrix Sentinel Ancestor, The Pipe Inspector Robot From Krakow
Watch out, Keanu!
Auto-Focus Smart Glasses Have Liquid Lenses
'Hufhuf oil held in static tension by an enclosing force field within a viewing tube...'
Robotic Physician Assistant Has Steady 'Hands'
'You turned the screws below and the prongs moved... with caliper slowness, minuteness and precision.'
Roboy 3DPrinted Humanoid Robot
'A robot child that would be reared within the bosom of a human family...'
Robird Flapping Wing Drones Keep Airports Safe
'Mitch heard a rasping, flacketing buzz, like a big insect...'
3D Printed Fashion - Plastirobes And Transdresses
'... dial a new fashion every day!'
Robotic Lawn Mower Powered By Sun, Arduino
'The mower reached the edge of the lawn, clucked to itself like a contented hen...'
Google Perfects 'Blade Runner-style' Photo Details
'Pull back... stop... enhance 57-19...'
Pokerbot Libratus Learns To Lie (Bluff)
'Lying's a vital part of your psychological defense system - you're naked without it!'
Otto Autonomous Robot Trucks Run Into... Legal Snag
'They were automatic trucks such as are used for making deliveries...'
Tiny Drones With Sticky Feet Pollinate Flowers Now
'The Scarab rubbed its hind legs together...'
ThreeForm 3D Scans And Digitally Simulates Customer Fashion
'...A miracle of misapplied engineering caused his own face to appear on the illustrated figures dressed in trooper red.'
CloudFisher - Moroccan Fog Farmers Harvest Moisture From The Air
'That moisture trickles down...'
Piaggio Gita Personal Robot Porter
'Carry his bag... and follow him faithfully...'
Ardu McDuino, Bagpipe Robot
'Rollo sat at the keyboard, prim, inhuman, rigid, twin lenses focused...'
Not Quite Self-Replicating Robots, Franka Emika
'... it shares with mankind the ability to propagate.'
More SF in the News Stories
More Beyond Technovelgy science news stories