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2. Halo (optical phenomenon) - Wikipedia

   en.wikipedia.org/wiki/Halo_(optical_phenomenon)

   Halo (optical phenomenon) A halo (from Ancient Greek ἅλως (hálōs) 'threshing floor, disk') [1] is an optical phenomenon produced by light (typically from the Sun or Moon) interacting with ice crystals suspended in the atmosphere. Halos can have many forms, ranging from colored or white rings to arcs and spots in the sky.

3. 22° halo - Wikipedia

   en.wikipedia.org/wiki/22°_halo

   Around the Sun, it may also be called a sun halo. [1] Around the Moon, it is also known as a moon ring, storm ring, or winter halo. It forms as sunlight or moonlight is refracted by millions of hexagonal ice crystals suspended in the atmosphere. [2] Its radius, as viewed from Earth, is roughly the length of an outstretched hand at arm's length. [3]

4. Celestial spheres - Wikipedia

   en.wikipedia.org/wiki/Celestial_spheres

   Following Anaximander, his pupil Anaximenes (c. 585 – c. 528/4) held that the stars, Sun, Moon, and planets are all made of fire. But whilst the stars are fastened on a revolving crystal sphere like nails or studs, the Sun, Moon, and planets, and also the Earth, all just ride on air like leaves because of their breadth. [9]

5. Here's Why You Shouldn't Charge Your Crystals During ... - AOL

   www.aol.com/heres-why-shouldnt-charge-crystals...

   During a lunar eclipse, the Earth is positioned between the sun and the moon, casting a shadow on the moon’s surface. This prevents the sun's light from fully illuminating the moon, which ...

6. Atmospheric optics - Wikipedia

   en.wikipedia.org/wiki/Atmospheric_optics

   Atmospheric optics. A colorful sky is often due to indirect sunlight being scattered off air molecules and particulates, like smog, soot, and cloud droplets, as shown in this photo of a sunset during the October 2007 California wildfires. Atmospheric optics is "the study of the optical characteristics of the atmosphere or products of ...

7. Circumhorizontal arc - Wikipedia

   en.wikipedia.org/wiki/Circumhorizontal_arc

   A circumhorizontal arc is an optical phenomenon that belongs to the family of ice halos formed by the refraction of sunlight or moonlight in plate-shaped ice crystals suspended in the atmosphere, typically in actual cirrus or cirrostratus clouds. In its full form, the arc has the appearance of a large, brightly spectrum-coloured band (red being ...