Post by Edward on Sept 13, 2004 15:59:20 GMT -5
Quite interesting I may add. I'll let you discover what lies ahead in this article.
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Space probes feel cosmic tug of bizarre forces
Robin McKie, science editor
Sunday September 12, 2004
The Observer
Something strange is tugging at America's oldest spacecraft. As the Pioneer 10 and 11 probes head towards distant stars, scientists have discovered that the craft - launched more than 30 years ago - appear to be in the grip of a mysterious force that is holding them back as they sweep out of the solar system.
Some researchers say unseen 'dark matter' may permeate the universe and that this is affecting the Pioneers' passage. Others say flaws in our understanding of the laws of gravity best explain the crafts' wayward behaviour.
As a result, scientists are to press a European Space Agency (Esa) meeting, called Cosmic Visions, in Paris this week for backing for a mission that would follow the Pioneers and pinpoint the cause of their erratic movements.
The strange behaviour of the Pioneers - which swept by Jupiter and Saturn in the Eighties - was discovered by John Anderson and Slava Turyshev of the Jet Propulsion Laboratory in Pasadena and Michael Martin Neito of the Los Alamos National Laboratory.
They had been tracking the probes using the giant dishes of Nasa's Deep Space Network. By the time the two spaceships had swept beyond Pluto, they noted there were persistent anomalies in their trajectories. Every time they looked the Pioneers were in the wrong place. The effect was not large, but it was significant. Something more than the Sun's gravity appeared to have a grip on the craft.
The reasons for the anomaly have caused a rift among physicists, however. Some believe the effect may simply be flaws with the probes. Gas from fuel tanks may be leaking from them, slowing their passages, say some astronomers. 'Unless there is really good evidence to the contrary, we should stick to simple ideas like these and not go around blaming strange new types of particle or flaws in general relativity,' said Professor Martin Barstow, of Leicester University.
--------------------------------------------
Space probes feel cosmic tug of bizarre forces
Robin McKie, science editor
Sunday September 12, 2004
The Observer
Something strange is tugging at America's oldest spacecraft. As the Pioneer 10 and 11 probes head towards distant stars, scientists have discovered that the craft - launched more than 30 years ago - appear to be in the grip of a mysterious force that is holding them back as they sweep out of the solar system.
Some researchers say unseen 'dark matter' may permeate the universe and that this is affecting the Pioneers' passage. Others say flaws in our understanding of the laws of gravity best explain the crafts' wayward behaviour.
As a result, scientists are to press a European Space Agency (Esa) meeting, called Cosmic Visions, in Paris this week for backing for a mission that would follow the Pioneers and pinpoint the cause of their erratic movements.
The strange behaviour of the Pioneers - which swept by Jupiter and Saturn in the Eighties - was discovered by John Anderson and Slava Turyshev of the Jet Propulsion Laboratory in Pasadena and Michael Martin Neito of the Los Alamos National Laboratory.
They had been tracking the probes using the giant dishes of Nasa's Deep Space Network. By the time the two spaceships had swept beyond Pluto, they noted there were persistent anomalies in their trajectories. Every time they looked the Pioneers were in the wrong place. The effect was not large, but it was significant. Something more than the Sun's gravity appeared to have a grip on the craft.
The reasons for the anomaly have caused a rift among physicists, however. Some believe the effect may simply be flaws with the probes. Gas from fuel tanks may be leaking from them, slowing their passages, say some astronomers. 'Unless there is really good evidence to the contrary, we should stick to simple ideas like these and not go around blaming strange new types of particle or flaws in general relativity,' said Professor Martin Barstow, of Leicester University.