This gigantic data set allows building the largest, deepest, and most accurate color-magnitude diagram ever produced, containing more than ten times more stars than any previous study.

The problem of course is that the colour magnitude diagram is complex and many-valued. So a star with a given colour could belong to one of several different stellar populations with different ...

The colour-magnitude relation diagram used by the researchers to uncover the quenching mechanism that quickly halts star formation (Image courtesy of the researchers) (click on image to enlarge) “The ...

The colour–magnitude diagram of NGC 1651 exhibits a clearly extended main-sequence turn-off ... (for example on the red side of the main sequence).

For example, they had determined the masses of many stars; they knew their apparent and absolute (actual, independent of distance) brightnesses, their colors and surface temperatures, and their ...