  Globular clusters in the outer halo (R_gc > 15 kpc) are found to be
systematically fainter than those at smaller Galactocentric distances. Within
the outer halo the compact clusters with half-light radii R_h < 10 pc are only
found at R_gc < 40 kpc, while on the other hand the larger clusters with R_h >
10 pc are encountered at all Galactocentric distances. Among the compact
clusters with R_h < 10 pc that have R_gc > 15 kpc, there are two objects with
surprisingly high metallicities. One of these is Terzan 7, which is a companion
of the Sagittarius dwarf. The other is Palomar 1. The data on these two objects
suggests that they might have had similar evolutionary histories. It is also
noted that, with one exception, luminous globular clusters in the outer halo
are all compact whereas faint ones may have any radius. This also holds for
globular clusters in the LMC, SMC and Fornax dwarf. The lone exception is the
large luminous globular NGC 2419. Possibly this object is not a normal globular
cluster, but the stripped core of a former dwarf spheroidal. In this respect it
may resemble Omega Centauri.
