Sagittarius B2 (Sgr B2)
A massive, dense HII region and molecular
cloud complex located near the center of our Galaxy, about 26,000 light-years
away. With a mass of some 3 million Msun and a density up to 108
particles/cm³, it is the richest concentration of molecules in the Milky
Way Galaxy. Many different types of interstellar
molecule have been identified within Sagittarius B2, including glycine,
the simplest amino acid (see amino acids, in space).
Sagittarius B2 may be part of a shell of material ejected by a large explosion.
