Atmospheric optics wavelengths. A halo (ἅλως; also known as a nimbus, icebow or gloriole) is an optical phenomenon produced by the interaction of light from the sun or moon with ice crystals in the atmosphere, resulting in colored or white arcs, rings or spots in the sky. Many halos are positioned near the sun or moon, but others are elsewhere and even in the opposite part of the sky. They can also form around artificial lights in very cold weather when ice crystals called diamond dust are floating in the nearby air. There are many types of ice halos. They are produced
Nimbus Sans Nimbus Sans Nimbus Sans is a sans-serif typeface created by URW++, based on Helvetica. It is a version using URW++ font source. The family supports Western Europe, East Europe, Turkish, Baltic, Romanian languages. Some of the fonts have history predating Helvetica's first release. For example, Nimbus Sans bold condensed, Nimbus Sans bold condensed (D) were dated 1940; Nimbus Sans Black Condensed, Nimbus Sans Black Condensed (D) were dated 1946. The font names ending with (D) have slightly lighter font weights and tighter spacing. It is a version of Nimbus Sans with even tighter spacing than the Nimbus Sans (D) fonts.