re: An astronomy quiz for you, Raoul.
Comet Ikeya Seki, in October 1965. One of a family known as "sun-grazers", its orbit takes it within a million miles of the surface of the sun. Some members of the family actually crash onto the Sun! Those that survive the encounter are dazzlingly bright. Ikeya Seki could be seen by the naked eye adjacent to the Sun, in full daylight .