It is thought planets have dynamos in their centre. This explains the intensity and geometry of the magnetic fields found on the surface. The dynamo is in the form of a fluid sphere of molten iron which is churning around producing electric currents and magnetic fields. But Mars has a strange field. Only the southern hemisphere has a strong magnetic field, emanating from the crust. Secondly, this crustal field is very strong, about ten times what’s found on Earth or other rocky planets. This is one of a range of amazing anomalies with Mars. Saturn has other problems. Its fields are too perfect. Sabine Stanley explains.
Tagged with “saturn” (3)
Cassini has given us a whole new view of Saturn, Titan, and other moons of this amazing and beautiful ringed world. Kevin Grazier from Cassini provides an overview of what has been learned so far from the mission and talks with Bob Mitchell, the Cassini Program Manager, and John Smith, the Cassini tour designer.
Hugo Award nominee and winner Charles Stross is in studio to chat about his latest book, Saturn’s Children. Charles explains how the story is really a Heinlein styled period piece, an homage to Heinlein’s late period, and tells the story of an android designed to be a sex robot for humans, only humans have gone extinct before she rolls off the assembly line.
Why else would a robot have been built with nipples?
The talk ranges from the appeal of Heinlein, the book sales percentages in the UK, and about the next few books he is working on, a sequl to Halting State, and more in the Merchant Princes series.