성단(星団)이라는 측정자

과학동아 1988년 05호

if Harris is correct, the brightness of the brightest globular clusters can be relied on more safely than the brightness of the bright-est individual supergiants. The globular cluster method may, there-fore, give us reliable distances for the near-est 6,000 galaxies. This will be an important improvement over the present situation, but there are still billions more galaxies. We must ...