Appendix – 7

Number of View - 111363

 

The “bow-tie”.

 (1 (p. 38))

The radio source 3C236, known as the “bow tie,” stretches roughly 20 million light-years and is the largest structure ever detected in the universe. About 2 billion years ago, if observed with the naked eye, this structure would have appeared only slightly larger than the Moon.

In this image of the radio source, taken with the Westerbork Synthesis Radio Telescope at a wavelength of 49 cm, the darkest regions correspond to the maximum intensity of radio

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