Particles emitting radio waves stream millions of light-years into space from the heart of the galaxy Centaurus A in this picture made by CSIRO. Data for the image was gathered with CSIRO's Australia Telescope Compact Array and Parkes radio telescope: the frequency of the radio waves was 1.4 GHz. The smallest structure visible in the image is 680 parsecs (210 light-years) across : the scale bar represents 50,000 parsecs (about 163,000 light-years). The white dots are not stars but background radio sources, each a huge galaxy like Centaurus A in the distant universe.
Image credit: Ilana Feain, Tim Cornwell & Ron Ekers (CSIRO/ATNF). ATCA northern middle lobe pointing courtesy R. Morganti (ASTRON), Parkes data courtesy N. Junkes (MPIfR).
Photographer : I. Feain et al / CSIRO ATCA and Parkes
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<table style="border:1px solid;padding:2px; width:310px;" ><tr><td><a href="http://www.scienceimage.csiro.au/image/10850/"><img src="http://www.scienceimage.csiro.au/images/embed/300_200_PA11479.jpg" width="300" alt="The Centaurus A galaxy" style="margin: 0 0 5px 0; border: 0px;"></a><br/><a href="http://www.scienceimage.csiro.au/image/10850/">The Centaurus A galaxy</a><br />by CSIRO</td></tr></table>
The Centaurus A galaxy