Resumen de Milky Way retired early from star-making
Misha Haywood at the Paris Observatory and his colleagues decided that studying Earth's galaxy is the best way to probe the chemical signatures of tens of thousands of stars--a clue to their ages--recorded by a high-resolution spectrograph at the Sloan Digital Sky Survey telescope in New Mexico. With the data, they were able to reconstruct a record of the Milky Way's past. They found that the galaxy's star formation rate dropped by an order of magnitude between 1.0 billion and 8 billion years ago.
