Re: Question: what is the SAA on the map showing orbital paths?

In article <IKt0Ly.IMp@xxxxxxxxxxxxx>,
Henry Spencer <henry@xxxxxxxxxxxxx> wrote:

snip
>
>Just *why* the field is moving is a bit less clear. It's also changing in
>other ways, which are even less understood. One theory is that we are in
>the early stages of a field reversal, and we can expect the field to
>weaken and become confused as the reversal proceeds. (A reversal probably
>doesn't involve the field dying down to zero and then building up again
>pointed the other way; more likely, the intermediate phase is a somewhat
>weak field with a complicated, confused structure, out of which order
>slowly re-emerges.)

Amusingly, if it is a field reversal it may coincide
with the Solar System's collision with the Local Fluff, a dense
interstellar cloud that may push the heliopause down below one
AU. I wonder how long it has been since the last time we had both
a reversal and were directly exposed to the interstellar medium?
happened was?
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