Examlex
What characteristic of a star cluster is used to determine its age?
Q11: The central star of the Crab Nebula
Q13: Nearly all the elements found in nature
Q18: Many of the brightest stars we see
Q34: Most open clusters in our Milky Way
Q36: Compare the amount of time a 20
Q61: What is the key factor that determines
Q73: Spectra of stars often show narrow absorption
Q94: Isolated main sequence stars as massive as
Q100: Explain what a standard candle is and
Q105: In an eclipsing binary, the longer the