Explore the 3D magnetic field observations associated with filamentary molecular clouds in this comprehensive astrophysics seminar. Delve into innovative techniques for determining the line-of-sight strength and direction of magnetic fields using Faraday rotation measurements. Examine the application of these methods to nearby filamentary molecular clouds, revealing intriguing magnetic field reversals. Investigate the 3D morphology of the Orion A cloud's magnetic field through combined line-of-sight and Planck's plane-of-sky observations, models, and statistical tools. Discover the reconstruction of overall magnetic field morphologies for the Perseus and Orion A clouds, including their signed direction without ambiguity. Gain insights into intrinsic rotation, dispersion of rotation, and morphologies in the interstellar medium. Analyze parallel studies, ideal MHD assumptions, and simplified models. Explore simulations of personal bubbles and origami clouds, and examine the frequency and source densities of magnetic field observations in molecular clouds. Read more