How can this be? It's one, big cosmic illusion. Tap to view if on News app. This type of eclipse is called a selenelion (or "horizontal eclipse"), where a viewer can see both the total lunar ...

This phenomenon is known as Selenelion when the sun and moon are 180 degrees apart in the sky at the same time," reads a Sept. 20 Facebook post. A photo accompanying the post purportedly ...

This effect is known as selenelion — pronounced "sell-a-NELL-ion," to rhyme with "hellion" (though "sell-a-NEEL-ion" may be an alternate). To see it, you have to be at just the right place at ...

The little-used name for this effect is called a "selenelion," a phenomenon that celestial geometry says cannot happen. You may like What will happen during the total lunar eclipse of March 2025?

The little-used name for this effect is called a "selenelion," a phenomenon that celestial geometry says cannot happen. And indeed, during a lunar eclipse, the sun and moon are exactly 180-degrees ...

Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky.

The little-used name for this effect is a "selenelion" (or "selenehelion") and occurs when both the sun and the eclipsed moon can be seen at the same time. Seeing the impossible But wait!

How can this be? It's one, big cosmic illusion. Tap to view if on News app. This type of eclipse is called a selenelion (or "horizontal eclipse"), where a viewer can see both the total lunar ...