The Murchison Widefield Array (MWA) is an innovative widefield low-frequency radio telescope sited in radio-quiet Western Australia.  Operating in the frequency range from 80 MHz to 300 MHz, key projects are 21cm cosmology during the Epoch of Reionization, transient radio sources, and ionospheric and heliospheric studies.  The instrument is versatile, and many other studies in Galactic and extragalactic radio astronomy are anticipated.

MIT/MKI is a founding member of the MWA Consortium, made up of institutions in the United States, Australia, India, and New Zealand.  The US archive for sky-imaging data, with a focus on enabling 21cm cosmology, is located at MKI.  The MWA is currently being commissioned, and early operations will commence in July 2013.   See for more information.