Figure 22-10: R I V U X G
Stellar Populations: Disk Versus Central Bulge The disk and central bulge of the Milky Way contain rather different populations of stars. The same is true for the galaxy NGC 1309, which has a similar structure to the Milky Way Galaxy and happens to be oriented face-on to us. NGC 1309 is about 30 million pc (100 million ly) from us in the constellation Eridanus.
Stellar Populations: Disk Versus Central Bulge The disk and central bulge of the Milky Way contain rather different populations of stars. The same is true for the galaxy NGC 1309, which has a similar structure to the Milky Way Galaxy and happens to be oriented face-on to us. NGC 1309 is about 30 million pc (100 million ly) from us in the constellation Eridanus.
(NASA, ESA, The Hubble Heritage Team [STScI/AURA] and A. Riess [STScI])