• Old:

    New:

    Hint: The natural limit to the luminosity of stars, or the radiation generated by accretion onto a compact object, is named in his honour.

    More hints available on request

  • Love seeing Cambridge tags happening, good work. Always say what the old one was--in this case, I'm not sure what exactly @Belagerent intended, but the clue was for the Omar Faruque Mosque and Cultural Centre off Kirkwood Road, and the mast is next to its driveway.

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