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Solar system --- Astronomie --- Kometen --- 523.64 --- Comets --- 523.64 Comets --- C5 --- Maatschappelijke organisaties en maatschappelijk leven --- Halley's comet. --- 1P/ Halley (Comet) --- Comet 1P/Halley --- Comet Halley --- Komeet van Halley --- Comètes --- Comète de Halley --- Geïnteresseerden in astronomie