HDR: Earth’s Circular Shadow on the Moon

What would possibly perchance well well perchance also set apart this type of tidy circular shadow on the Moon? The Earth. Remaining week’s plump Moon — the Buck Moon — used to be so plump that it fell nearly exactly in a line with the Sun and the Earth. When that happens the Earth casts its shadow onto the Moon. The circularity of the Earth’s shadow on the Moon used to be commented on by Aristotle and so has been noticed since a minimal of the 4th century BC. What’s novel is humanity’s capability to file this shadow with such high dynamic vary (HDR). The featured HDR composite of final week’s partial lunar eclipse combines 15 footage and encompass an exposure as immediate as 1/400th of a second — in uncover no longer to overexpose the brightest segment — and an exposure that lasted 5 seconds — to bring up the dimmest segment. This dimmest segment — inside of Earth’s umbra — is no longer any longer totally dark because some gentle is refracted by the Earth’s ambiance onto the Moon. A total lunar eclipse will occur subsequent in 2021 Might maybe maybe perchance additionally. Partial Lunar Eclipse in 2019 July: Some memorable footage submitted to APOD