Dellah

Dellah, a resource-poor planet on the fringes of Earth Empire space, was home to St. Oscar's University in the late 26th century. Bernice Summerfield lived on Dellah for several years in the 2590s. It was an M-type (Earth-like) planet orbiting a single star, and had no moons. (BNA: Ship of Fools)

Astronomical data
Dellah was mostly covered by temperate oceans, and dotted with islands. Its largest body of water, the Silvasic Sea, took up most of the temperate zone (between 23.5°S and 66.5°S) in Dellah's southern hemisphere. (BNA: Dry Pilgrimage)

Known landmasses

 * The Marek Dha landmass and an associated island chain, called the Marek Dha islands. These islands--many of them private--were dotted with extremely luxurious homes for the very very wealthy, such as industrialist Marcus Krytell. (BNA: Ship of Fools)
 * Chain of several hilly islands in the northern hemisphere, home to St. Oscar's University and Dellah's only spaceport. (BNA: Oh No It Isn't!)