Articles related to "Population Ii"

During World War II, Baade discovered that there were distinct stellar populations: The older Population II stars and Younger Population I stars.

Edwin Hubble devised the scheme that astronomers use to classify galaxies outside the Milky Way galaxy.

Stars cluster together in groups ranging from binary star systems to galactic and globular clusters of stars and at larger scales galaxies and clusters of galaxies.

Galaxies like our Milky Way are large groups of stars containing from a few million to about a trillion stars. Galaxies also group together in clusters of galaxies.

A brief overview of the history of the universe from its origin in the big bang to the origin of life on Earth and how the needed raw materials for life formed.