#selenehelion

[manhattan-forever]

Blood moon 2018: the lunar eclipse – as it happened 

The sun (or blood moon) has set on our time together.

Tonight, the globe has witnessed the longest celestial event of the 21st century.

The so-called blood moon was visible at different times in Australia, Africa, Asia, Europe and South America when the sun, Earth and moon lined up perfectly, casting Earth’s shadow on the moon.

└─► Total Lunar Eclipse on July 27–28, 2018 

└─► Lunar eclipse - Wikipedia

[deliaopran]

#Selenelion or selenehelion is a rare cosmic event which happens when both the total eclipse of the moon and the rising sun are seen simultaneously, in the sky, something that celestial geometry says cannot occur. This can only happen just before sunset or just after sunrise, and both bodies will appear just above the horizon at nearly opposite points in the sky. This arrangement has led to the phenomenon being referred to as a horizontal eclipse. There are typically a number of high ridges undergoing sunrise or sunset that can see it. Although the Moon is in the Earth’s umbra, the Sun and the eclipsed Moon can both be seen at the same time because the refraction of light through the Earth’s atmosphere causes each of them to appear higher in the sky than their true geometric position.