This book's interdisciplinary scope aims at bridging various communities: 1) cosmochemists, who study meteoritic samples from our own solar system, 2) (sub-) millimetre astronomers, who measure the distribution of dust and gas of star-forming regions and planet-forming discs, 3) disc modellers, who describe the complex photo-chemical structure of parametric discs to fit these to observation, 4) computational astrophysicists, who attempt to decipher the dynamical structure of magnetised gaseous discs, and the effects the resulting internal structure has on the aerodynamic re-distribution of embedded solids, 5) theoreticians in planet formation theory, who aim to piece it all together eventually arriving at a coherent holistic picture of the architectures of planetary systems discovered by 6) the exoplanet observers, who provide us with unprecedented samples of exoplanet worlds. Combining these diverse fields the book sheds light onto the riddles that research on planet formation is currently confronted with, and paves the way for a comprehensive understanding of the formation, evolution, and dynamics of young solar systems.

The chapters Chondrules Ubiquitous Chondritic Solids Tracking the Evolution of the Solar Protoplanetary Disk, Dust Coagulation with Porosity Evolution and The Emerging Paradigm of Pebble Accretion are published open access under a CC BY 4.0 license via link.springer.com.

Martin Pessah is a Professor at the Niels Bohr International Academy at the Niels Bohr Institute, University of Copenhagen. His research interests span a broad range of subjects in plasma astrophysics, astrophysical fluid dynamics and magnetohydrodynamics; these include fundamental aspects of accretion physics in young starts and compact objects, the interstellar medium, and the intracluster medium in galaxy clusters.

Oliver Gressel is an Assistant Professor at the Niels Bohr International Academy in Copenhagen. He received his PhD in Astrophysics from the University of Potsdam in 2009, and is known for his outstanding work in the area of mean-field magnetohydrodynamics and dynamo theory, for which he received the 2015 Johann Wempe Award. His research interests include magnetic turbulence in the interstellar medium and in protoplanetary discs and the influence of the ensuing perturbations on the formation of stars and planets.

Tracing the Ingredients of Habitable Worlds.- Planet Traps and the Composition of Exoplanetary Populations.- Towards a Global Evolutionary Picture of Protoplanetary Disks.- The ALMA revolution: gas and dust in planet-forming disks.- Evolution of the first embryos in protoplanetary disks: Confronting models and observations.- The gas content of protoplanetary disks.- Formation and long-term behavior of the solar system bodies.- planet formation mechanisms.- Collisional evolution of planetesimals.- Paleomagnetic measurements in meteorites.- Debris Disks.- Accreting Protoplanetary and Circumplanetary Disks.- Spirals, Gaps, and Cavities: Signposts of Forming Planets in Protoplanetary Disks?.- planet formation in circumbinary systems.- Glimpsing the Composition Distribution of Short-Period Exoplanets.- Formation of close-in Kepler Planets.- Tidal star-planet interactions in hot Jupiter systems.- Insights into

Planet Formation from Transit Timing Variations.