Halo (optical phenomenon) - Wikipedia
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 …
How to See Halos, Sun Dogs and Other Delights of the Daytime Sky
2023年12月15日 · Parhelia, or sun dogs, in the vernacular, are bright spots on each side of a halo that are set parallel with the horizon. They’re also caused by hexagonal ice crystals—ones that …
What makes a halo around the sun or moon? - EarthSky
2023年5月31日 · If you do see a halo around the moon or sun, notice that the inner edge is sharp, while the outer edge is more diffuse. Also, notice that the sky surrounding the halo is darker …
Circumzenithal arc - Wikipedia
The arc is located a considerable distance (approximately 46°) above the observed Sun and at most forms a quarter of a circle centered on the zenith. It has been called "a smile in the sky", …
'Pilot's Glory': Why a Rainbow Encircles an Airplane Shadow on …
2024年3月7日 · A "Pilot's Glory" is an optical phenomenon where a halo appears to encircle an airplane's shadow against clouds, caused by the backscattering of sunlight by tiny water …
10 bizarre phenomena that lit up the sky (and their scientific ...
2023年8月19日 · From UFO-like rings to blood-red arcs, here are 10 bizarre atmospheric light shows with a surprisingly simple explanation. A halo of red light briefly appeared in the night …
大气晕 - 环境百科全书 - Encyclopédie de l'environnement
2016年10月1日 · Broadly speaking, an atmospheric halo is a more or less strong accumulation of light, appearing in the sky as a spot, a circle, or an arc, which is mainly due to the refraction …
The Tilt in our Stars: The Shape of the Milky Way's Halo of Stars is ...
2022年11月18日 · Fathoming the shape of the Milky Way's stellar halo, though, has long challenged astrophysicists for the simple reason that we are embedded within it. The stellar …
Circumhorizontal arc - Wikipedia
Apart from the presence of ice-containing clouds in the right position in the sky, the halo requires that the light source (Sun or Moon) be very high in the sky, at an elevation of 58° or greater. …
A look into the brilliant displays of atmospheric optics
2017年11月22日 · The angles of light passage involved with 22° halos can erode the magnitude of the array of colors refracted by the crystal. This often gives the white-like appearance of …