: Everyone knows the kind : They protected Earth's location from the Pfhor.
: However:
: - Where to they originate from ? The star inside the system of question, or
: from another star system?
In current use, "solar wind" is helium (and some other) ions thrown off by our Sun as a byproduct of solar fusion. As such they radiate out from the Sun... I think there's a bias in the distribution, that most of it goes out the ecliptic, but am not sure. (It's been more than a decade since Astronomy.)
In Marathon usage, I'm not sure; real-life solar winds don't do a terribly good job of masking EM signatures because they're just too thin.
: Thanks everyone. Also: A planet must have at least an Earth-range orbit to
: avoid being reduced to an Venus or Mercury-style planet , yes?
Not quite; it's a very complex problem. I've found an online resource here: http://www.world-builders.org/ I haven't checked it too deeply, but it is a resource for a course at CSU so I imagine it can't be too far off.
-- Steve used to keep an eye out for that kind of stuff, and may start doing so again.