History of HVC research:an overview

The discovery of gas clouds at high velocity outside the disk of the Milky Way dates from the middle of the 20th century. Since their discovery, numerous new techniques and new instruments have allowed great strides in the understanding of the high-velocity cloud phenomenon. This chapter presents a review of these developments, organized by period (five sections each covering about one decade), and within each period summarizing the progress in each of several subfields, such as radio surveys, UV observations, and theories