related tags: 140E09 1A0D04 513C30 AC937A B8BBB7 B9BAB8 C59361 DCE5E9 DFE3E6 astrofest astronomy britain england firstknowninterstellarobject greatbritain highstreetkensington interstellar kensington kensingtontownhall london michaelbanniste oumuamua uk 613820