Hubble’s Caldwell Catalog – #15 (NASA)

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“Caldwell 15 was discovered by British astronomer William Herschel in 1793. With a magnitude of 8.8, the nebula is found in the constellation Cygnus, and it is best observed during warm summer nights in the Northern Hemisphere. It will appear low in the northern sky for Southern Hemisphere observers during the winter. Also known as NGC 6826, Caldwell 15 is about 2,200 light-years away from Earth.” (NASA)

26 May 2021: Total lunar eclipse (NASA)

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“…May 26 brings a total lunar eclipse. Over several hours, the Moon will pass through Earth’s shadow, causing it to darken and usually become reddish in color. The red color comes from sunlight filtering through Earth’s atmosphere – a ring of light created by all the sunrises and sunsets happening around our planet at that time. Because of the reddish color, a lunar eclipse is often called a ‘blood moon.’ ” (NASA)

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