Chapter 2: Header Keyword Definitions . At the end of the header file, certain keywords and phrases will appear as a warning of an anomalous situation or to flag or emphasize a particular condition (e.g., slewing). ... Target acquisition failure) . ... All observations following the failure and preceding the next baseline guide star acquisition will contain this keyword. ... Each observation until the next baseline guide star acquisition will have this keyword appended to the header file. ...

... 70 · Winter 2007 www.astrosociety.org/uitc © 2007, Astronomical Society of the Pacific 390 Ashton Avenue, San Francisco, CA 94112 Hubble Observations of Ceres and Pluto: A Closer Look at the "Ugly Ducklings" of the Solar System by Max Mutchler Space Telescope Science Institute Introduction regret that my 4th Grade teacher, Mrs. Hadley, doesn't know that she provided me with the very first astronomy book that I ever read, because it had a profound impact on me. ... Planet count 7 6 7 11 12 13 8 9 9? ...