'Leader' Prince William embraced his role as the 'future king' while Harry was lost in quiet emotion and Zara Tindall offered a 'supportive presence' at the vigil I will treasure forever': Prince Andrew pays heartfelt tribute to the Queen 'Mummy, your love for a son, your compassion, your care. Kate meets Ukraine's First Lady: President Zelensky's wife Olena sits down with Princess of Wales at Buckingham Palace before seeing Queen lie in state World's royals arrive in London: King Felipe and Queen Letizia of Spain lead the foreign monarchs who will join Charles for 'reception of the century' Guests arrive for reception at Buckingham Palace: King Charles greets royals and leaders as he hosts event on eve of Queen's funeral The Macrons pay their respects to the Queen in TRAINERS: Emmanuel Macron and French First Lady Brigitte dress for comfort Harry and Meghan's friend says it is 'beyond bonkers' that couple have been 'uninvited' from Buckingham Palace reception saying couple 'feel excluded' Joe Biden mourns the Queen: US President and First Lady Jill pay their respects to Her Majesty at Westminster Hall before signing book of condolence The phenomenon was the result of the pileus cloud - sometimes known as a 'cap cloud' or 'scarf cloud' - forming just at the right time of the evening to produce 'cloud iridescence' - or a rainbow cloud. However he sounded a note of caution, warning that the pileus cloud almost seemed 'too bright' and that the footage might have been 'tampered with.' 'The low sun appears to be catching these ice crystals and being refracted by them which is why the observer at ground level can see and array of rainbow colours.' 'Pileus clouds are an accessory cloud that commonly form in association with cumulus or cumulonimbus clouds (where there are strong updrafts) and, because pileus clouds form high up in the atmosphere, they are made of ice crystals.

'The footage shows a pileus (or scarf) cloud encircling a darker coloured cumulus cloud,' he said, adding that 'one might expect to see some optical phenomena as you have ice crystals aloft (the pileus cloud) and the sun almost on the horizon.' A spectacular and vanishingly rare 'rainbow scarf cloud' dazzled residents in China when it briefly appeared on the horizon during sunset

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