Fotografia - Lisboa nocturna - Exposição do Mundo Português, Lisboa, 1940

Estúdio Horácio Novais, Vista aérea da Exposição do Mundo Português, Lisboa, 1940 Colecções da Fundação Calouste Gulbenkian, Lisboa, Portugal (Flickr Commons).

Astronomy picture of the day - 2017 March 1 - A Solar Eclipse with a Beaded Ring of Fire

A Solar Eclipse with a Beaded Ring of Fire 
Image Credit & Copyright: Stephen Bedingfield

Explanation: What kind of eclipse is this? On Sunday, visible in parts of Earth's southern hemisphere, the Moon blocked part of the Sun during a partial solar eclipse. In some locations, though, the effect was a rare type of partialeclipse called an annular eclipse. There, since the Moon is too far from the Earth to block the entire Sun, sunlight streamed around the edges of the Moon creating a "ring of fire". At some times, though, the effect was a rare type ofannular eclipse. Then, an edge of the Moon nearly aligned with an edge of the Sun, allowing sunlight to stream through only low areas on the Moon. Called a "Baily's bead" or a "diamond ring", this doubly rare effect was captured Sunday in the feature photograph from Chubut, Argentina, in South America. This summer a total solar eclipse will swoop across North America.