People wonder what's the point of going to these other planets. One use is to calibrate the General Circulation Models used in Earth weather modelling with those of Jupiter, Mars and Venus.
They are all planets and a really good model should work everywhere, provided the right parameter values are inserted.
Best news. You'd never have trouble with a compass not working. OTOH the radiation will cook you. Incidentally I'd doubt the Earth's magnetic field is quite at constant as people think, given that Magnetic Anomaly Detection is a tool of geophysicists for detecting ore bodies (and the occasional nuclear submarine)
I look forward to the first probe powered by one of the Kilopower nuclear reactor systems (or KRUSTY) which should allow ion thrusters to be used to get there then increase the data rate a fair bit.