Astrophysics & Cosmology

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Cosmic Rays on Demand

In a SLAC test facility, scientists have set the stage for an experiment that mimics what happens when incredibly energetic cosmic ray particles hit our atmosphere. While the experiment is part of ANITA, which sends balloon-borne instruments into the upper atmosphere, the results could benefit a broad range of other experiments.

SLAC Research Makes Science Magazine's Top 10 of 2013

Editors of the journal Science, published by the American Association for the Advancement of Science, have selected their annual Top 10 Science Breakthroughs of the Year. On the list: Work by SLAC researchers pinning down the origin of cosmic rays.

Symmetry: The Universe's Earliest Moments

How is it possible to look at the earliest moments of the universe? Physicists have their ways—and what they find out will tell us a lot about how the universe works today and how it will unfold in the future.

Home Computers Discover Gamma-ray Pulsars

As volunteers for a project called Einstein@Home, citizen scientists unleashed the unused cycles of their home computers on data from the Large Area Telescope, the SLAC-operated main instrument of the Fermi Gamma-ray Space Telescope, and found four new pulsars.