A collection of problems with the EC idea
(updated to add the failure of the voltage drop prediction from EC)
EC universe: Comets are rocky bodies, comparable to asteriods and probably created in the same event as asteriods (according to Thunderbolts).
Real universe:
- Comets have meaured densities that are much less than that of rocks (asteroids).
- Comets may not have the composition of asteriods
- Deep Impact confirmed that comet nuclei are made of dust and ice not rock. There were a couple of surprises in that the dust was talcum powder rather than sand and the amount of ice was smaller than expected.
"Analysis of data from the Swift X-ray telescope showed that the comet continued outgassing from the impact for 13 days, with a peak five days after impact. A total of 5 million kilograms (11 million pounds) of water[35] and between 10 and 25 million kilograms (22 and 55 million pounds) of dust were lost from the impact."WPThus the water content of Comet Tempel 1 is 20% to 50%.
EC universe: Comet jets, coma and tails are created from material that that is created from rock by
electrical discharge machining.
(but according to solrey EDM does not mean EDM in the EC universe!).
Real universe:
Start with Tim Thompson's posts about this
Then look at
EC universe: Rocky bodies that have an orbit with an eccentricity above a minimum value will be comets.N.B. Solar activity may cut tails in two but there have been no observations of comets turning off during low solar activity.(Sol88: I may be wrong - if so please provide the citations to these marvelous events.)
However this assertion has the fatal flaw of EC predictions - no mathematics or numbers.
But we can do their work for them can't we Sol88?
There are 4 observed
main-belt comets with a minimum eccentricity of 0.1644 (
133P/Elst-Pizarro). So the EC minimim must be this (or lower!).
Real universe: There are at least 173,583 asteroids (rocky bodies) that have an orbit with an eccentricity above a minimum value that are
not comets. This includes asteroids that have been observed for decades.
There are 459,893 asteroids with eccentricities greater than the minimum observed eccentricity of comets (0.0279).
EC predicts that 100,000's of asteroids should be comets
EC universe: solrey pointed out in this
post that EC idea expects that the voltage potential a comet experiences would be orders of magnitude higher than that of the cloud to ground voltage potential in a thunderstorm (
109 volts).
"Several" is more than a couple so the EC idea expects a voltage drop around a comet of at least 10
12 volts.
Real universe: tusenfem pointed out that "
Electric Fields and Cold Electrons in the Vicinity of Comet Halley" by Harri Laakso gave the measured potential drop between electrical layers around Comet Halley as
50 kV in this
post. This is 10,000 times less than the thunderstorm potential and 10,000,000 times less that requires by the EC idea.
EC universe: Only give qualitative predictions.
Sol88 posted a
list of EC "predictions" for Tempel 1 and Deep Impact. The closes it gets to an actual quantitative predictions is "The most obvious would be a flash (lightning-like discharge) shortly
before impact." (emphasis added).
What actually happened was a flash
on or after impact followed by a bigger one from deeper in the nucleus (according to
NASA).
Real universe: Scientific theories model the data mathematically and produce both qualitative and quantitative predictions.
Someone could start with the papers of Whipple
- Whipple, Fred L. (1950). "A Comet Model. I. The acceleration of Comet Encke". Astrophys. J. 111: 375–394.
- Whipple, Fred L. (1951). "A Comet Model. II. Physical Relations for Comets and Meteors". Astrophys. J. 113: 464.
- Whipple, Fred L. (1955). "A Comet Model. III. The Zodiacal Light". Astrophys. J. 121: 750.
and then go ointo the 1000's of scientific papers and many textbooks about comets. Tim Thompson recommened
Introduction to Comets by Brandt & Chapman (Cambridge University Press, 2004, 2nd edition).
EC universe: Turn yourself into a crackpot idea by not publishing papers in peer reviewed journals.
Real universe: Take the risk being wrong and become part of the scientific process by publishing papers in peer reviewed journals, e.g. Fred L. Whipple.