Extended, fading emissions in multi-wavelength are observed following
Gamma-ray bursts (GRBs). Recent broad-band observational campaigns led by the
Swift Observatory reveal rich features of these GRB afterglows. Here we review
the latest observational progress and discuss the theoretical implications for
understanding the central engine, composition, and geometric configuration of
GRB jets, as well as their interactions with the ambient medium.Comment: References added, accepted for publication in Advances in Space
Researc