The said:

Refrence to finding sun's pressure at the convective zone

http://www.sparknotes.com/astronomy/sun/section4.rhtml

The convective zone is not the core of the sun, and any calculation for

pressure at the highest pressure point here (they don't supply a figure)

is far less than that in the core. In between the core and the convective

zone is the radiative zone, which is thicker than the convective zone.

Obviously most of the sun's mass is surrounded by the convective zone.

Meanwhile,

http://www.tqnyc.org/NYC040747/TheSun.htm
says either 250 billion or 340 billion atmospheres for pressure in the

core (gives 2 different figures).

http://www.proeducation.co.uk/pdfs/hires/sun.pdf says core pressure is

about 100 billion kc/cm^2, approx. 100 billion atmospheres.

Gives impact pressures in car collisions. Can you give any figures for

the peak pressure in the comet impact?

http://www.lpi.usra.edu/meetings/lpsc2002/pdf/1875.pdf says the probe has

a mass of 350 kg and was projected to hit the comet at 10.1 km/sec. The

news last night said the probe was about the size of a dishwasher - let's

say 1 square meter.

100 billion atmospheres, a lower estimate of pressure in the sun's core,

or roughly 1E16 pascals, implies a force in the ballpark of 1E16 newtons

to decellerate a probe with a frontal area of 1 square meter.

1E16 newtons divided by 350 kg is a decelleration of about 2.85E13

meters/sec^2. Divide this into square of 10,100 m/sec means that constant

decelleration would stop the probe in .0036 millimeter.

Since the probe's length/depth or whatever probably got squashed by a

good 100,000 times this, I would give a rough ballpark estimate of peak

pressure of a million atmospheres, good chance less given estimates of the

probe to dig up to 80 meters into the comet.

Looks like the peak pressure was around or less than 1/100,000 of that

in the sun's core.

How is this evidence of a nuclear reaction?

Refrence to pressures nearly equal to those achieved by deep impact.

http://flux.aps.org/meetings/YR01/DPP01/abs/S1600101.html

Highest pressure cited here is 2 Mbar, roughly 2 million atmospheres or

1/50 of a low figure for the pressure in the core of the sun.

This page also does not mention anything about "Deep Impact". I don't

see an explanation how a pressure nearly equal to any pressure mentioned

here is supposed to have occurred during "Deep Impact".

All of the required information needed to calculate an estimate is

refered to in all of the above links as a sum of links and refrences.

- Don Klipstein (

[email protected])