There's a report on December 20 out of NASA and JPL about Voyager 2 crossing through the heliosheath (http://www.nasa.gov/mission_pages/vo...ion_shock.html).

I thought this was very topical as you had just covered this and I was going to ask whether the solar system was fairly uniformly spherical. It was nice to read about the multiple shockwaves and understand what that meant.

My question is about the magnetic field mentioned in that report. There's an interstellar magnetic field? What's causing that? Where is it coming from? Could we have a show about magnetic fields? You could mention the aurora and the Earth's magnetic field as well as the solar magnetic field. And then stretch out further and further.

For now, I think I'll go read this page from SOHO:
http://sci.esa.int/science-e/www/obj...objectid=36805

Thank you for your continued great shows. I liked the tour of the solar system, but I also like when you use math and physics and stretch our brains.