Astronomy and Astrophysics | Eberly College of Science

New clues in the hunt for the sources of cosmic neutrinos

This illustration is an example of a hidden cosmic-ray accelerator. Cosmic rays are accelerated up to extremely high energies in dense environments close to black holes. High-energy gamma rays (marked by the “Y” gamma symbol) are blocked from escaping, while neutrinos (marked by the “V”nu symbol) easily escape and can reach the Earth. Credit: Bill Saxton at NRAO/AUI/NSF, modified by Kohta Murase at Penn State University

Gravitational waves detected 100 years after Einstein's Prediction: Opens New Window on the Universe with Observation of Gravitational Waves from Colliding Black Holes

Merging black holes ripple space and time in this artist's concept. Image credit: Swinburne Astronomy Productions

In Memoriam: Mercedes Richards (1955-2016)

Mercedes Richards, professor of astronomy and astrophysics

Top high-energy astrophysics prize awarded to Niel Brandt

Now you see it, now you don't: The quasar that just disappeared

The image shows an artist's conception of the changing-look quasar as is appeared in early 2015. The glowing blue region shows the last of the gas being swallowed by central black hole as it shuts off. The spectrum is the previous one obtained by the SDSS in 2003. Credit: Dana Berry / SkyWorks Digital, Inc.

Mysterious radio signals from space test Einstein's General Relativity theory

This illustration shows how two photons, one at a high frequency (nu_h) and another at a low frequency (nu_l), travel in curved space-time from their origin in a distant Fast Radio Burst (FRB) source until reaching the Earth. A lower-limit estimate of the gravitational pull that the photons experience along their way is given by the mass in the center of the Milky Way Galaxy. Credit: Purple Mountain Observatory, Chinese Academy of Sciences

Natasha Batalha’s Research and Accomplishments are Out of This World

NSF Grant Helps to Further the Search for Earthlike Exoplanets

Astronomy and Astrophysics: HETDEX

Staff Highlight: Selders Provides Critical Support

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