Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. HD 100546 is a star 337.3 LY from Earth. It is orbited by an approximately 20 Mj planet at 6.5 AU. Evidence for a planetary companion to HD 100546 was gathered using the UVES echelle spectrograph at the VLT in Chile. This confirms other data indicating a planetary companion. The planet's size puts it near the border between a giant planet and a brown dwarf. Spectroscopic analysis of mid-IR data taken from OSCIR on the 4 m Blanco Telescope at Cerro Tololo Inter-American Observatory indicates the presence of a small particles containing silicates.