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15th of August 2018
Studies of the Sun, part 3
With the launch of the Parker Solar Probe on the weekend, today's ADAP looks back at the history of solar research within CSIRO.. Monday's ADAP showed an antenna of the Culgoora radio-heliograph, which was located on the site of the Australia Telescope Compact Array near Narrabri in northern NSW. The radio-heliograph was able to detect both senses of circular polarisation of radio waves. In the image above, taken from this 1970 video, red corresponds to left-circular polarisation, and cyan to right-circular polarisation, so that areas with equal contributions from left- and right- circular polarisation appear white in the image. In this flare, the points closer to the sun have opposite polarisations, indicating the important role played by magnetic fields in these events.

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