On May 6, 2007, at 8:27 AM, Jones Beene wrote:
Horace Heffner wrote:
The Northern exposure idea would require a full galactic N-S
traversal (bobbing up and down) period, or about 130-200 M years,
while the period between extinctions is often roughly half that.
Hmmm ...Are you reading
On May 5, 2007, at 7:04 PM, Jones Beene wrote:
Once upon a time ... it was believed that our sun was paired with a
hypothetical companion star, 'Nemesis' which might orbit at a
distance of a light year or so. Nemesis was introduced to explain
an apparent periodicity in the occurrence of
photon pressure as was discussed here some time ago.
Michel
- Original Message -
From: Jones Beene [EMAIL PROTECTED]
To: vortex vortex-l@eskimo.com
Sent: Sunday, May 06, 2007 5:04 AM
Subject: [Vo]:The Ecliptic and Mass Extinctions
Once upon a time ... it was believed that our sun
Michel Jullian wrote:
No Jones, the 62My period vertical oscillation superimposed on the horizontal
circular orbit of the sun round the galactic center has nothing to do with the inclination of the solar
system plane wrt the galactic plane. It is a purely gravitational effect due to the
On 5/6/07, Jones Beene [EMAIL PROTECTED] wrote:
But Michel, the fact that in crossing the galactic plane recently (in
cosmological time), there has been no apparent increase in what could be
considered 'danger' or hazardous debris impacting earth - doesn't that
argue against your conclusion?
On May 6, 2007, at 3:15 AM, Michel Jullian wrote:
No Jones, the 62My period vertical oscillation superimposed on
the horizontal circular orbit of the sun round the galactic
center has nothing to do with the inclination of the solar system
plane wrt the galactic plane. It is a purely
Jones wrote:
But Michel, the fact that in crossing the galactic plane recently (in
cosmological time), there has been no apparent increase in what could be
considered 'danger' or hazardous debris impacting earth - doesn't that
argue against your conclusion?
I don't think so, crossing the
In reply to Horace Heffner's message of Sun, 6 May 2007 02:41:17 -0800:
Hi,
[snip]
Further, the hypothesis doesn't give a reason the major
extinctions start about 600 My ago.
I didn't think there was much life around to extinguish prior to 600 MY ago.
(Or if there was, then probably mostly
Once upon a time ... it was believed that our sun was paired with a
hypothetical companion star, 'Nemesis' which might orbit at a distance
of a light year or so. Nemesis was introduced to explain an apparent
periodicity in the occurrence of mass extinctions of around 65 million
years. In the
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