WASHINGTON — NASA will hold a media teleconference at 1 p.m. EDT Wednesday, Aug. 15, to discuss an extraordinary galaxy cluster that is smashing several important cosmic records.

The panelists are:

— Michael McDonald, Hubble Fellow, Massachusetts Institute of Technology, Cambridge, Mass.
— Bradford Benson, astrophysicist, University of Chicago
— Megan Donahue, professor of astronomy, Michigan State University, East Lansing
— Martin Rees, professor of cosmology and astrophysics, University of
Cambridge, United Kingdom

For dial-in information to ask questions, reporters must send their name, media affiliation and telephone number to j.d.harrington@nasa.gov by noon Aug. 15.

The general public also can ask the panelists questions via Twitter using the hashtag #asknasa.

Audio of the teleconference will be streamed live at: http://www.nasa.gov/newsaudio

For more information about NASA’s Chandra X-ray Observatory, visit: http://chandra.harvard.edu and http://www.nasa.gov/chandra