A day in the life of a mountaintop telescope builder

When she's in Chile, Margaux Lopez starts most days nine thousand feet below her place of work. At 6:30 a.m. she boards a bus to begin the steep climb from La Serena, Chile's second-oldest city, to the top of Cerro Pachón, ...

Fermi mission creates 14-year time-lapse of the gamma-ray sky

The cosmos comes alive in an all-sky time-lapse movie made from 14 years of data acquired by NASA's Fermi Gamma-ray Space Telescope. Our sun, occasionally flaring into prominence, serenely traces a path through the sky against ...

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