spherical component: The part of the galaxy including all matter in a spherical distribution around the center (the halo and nuclear bulge).
spicule: Small, flamelike projection in the chromosphere of the sun.
There is a spherical component to our galaxy which contains very old stars and spherical clusters of old stars. These are often referred to as Population 2 objects. Population 1 being the objects found in the disk.
The more massive stars in the spherical component added heavier elements (dust) to the newly-formed disk in which younger generations of stars are still forming.
A star cluster containing 50,000 to 1 million stars in a sphere about 75 light years in diameter; generally old metal poor and found in the spherical component of the galaxy.
Graben Rille ...
 See also: Universe, Orbit, Cluster, Galaxy, Light
  
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