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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.
22° halo around the Sun 22° halo around the Moon. A 22° halo is an atmospheric optical phenomenon that consists of a halo with an apparent diameter of approximately 22° around the Sun or Moon. 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.
The distance between the arc and the Sun or Moon is twice as far as the common 22-degree halo. Often, when the halo-forming cloud is small or patchy, only fragments of the arc are seen. As with all halos, it can be caused by the Sun as well as (but much more rarely) the Moon. [1]
A parhelic circle is a type of halo, an optical phenomenon appearing as a horizontal white line on the same altitude as the Sun, or occasionally the Moon. If complete, it stretches all around the sky, but more commonly it only appears in sections. [2] If the halo occurs due to light from the Moon rather than the Sun, it is known as a ...
NASA’s Artemis program took an important step forward this weekend, with CAPSTONE finally reaching its destination—a near-rectilinear halo orbit (NRHO) around the Moon. The 55-pound cubesat ...
Several distinct halo phenomena are featured in the photo: Two sun dogs (bright spots), a parhelic circle (horizontal line), a 22° halo (circle), and an upper tangent arc and a Parry arc (top). Complex Moon halo. Visible are: halo, Parry arc, upper tangent arc and Moon dogs. Upper tangent arc and sunvex Parry arc seen over Santa Rosa Beach ...
A lunar halo is formed when light hits ice crystals in clouds high in the atmosphere. Skip to main content. Sign in. Mail. 24/7 Help. For premium support please call: ...
The final full moon of meteorological winter illuminated the weekend sky, and for some skywatchers across the eastern United States, it created an eye-grabbing meteorological spectacle. February's ...