cow and beautiful landscape with blue sky and grassland

>For other uses, see Sky (disambiguation). The sky is (roughly) that part of the atmosphere or of outer space visible from the surface of the earth (or any other planet; see Skies of other planets).). Birds, airplanes, and kites are often considered to fly in the sky. It is difficult to define precisely for several reasons. During daylight the sky has the appearance of an opaque blue surface, but this is the result of the air refracting sunlight. There is no "blue object" above the earth in any normal sense, so it is hard to say what object the sky is. The sky is thus sometimes defined as the denser gaseous zone of a planet's atmosphere. At night the sky has the appearance of a black surface or region scattered with stars. But if we then say that the sky is the entire visible universe, it would not be the same thing we see during the day. See more at Wikipedia.org...

>COW is an acronym for a number of things:Can of wormsThe COW programming language, an esoteric programming language.Casualty of WarCell On WheelsCity of WestminsterCluster of WorkstationsCoalition of the WillingComputer Originated World, referring to the globe ID the BBC1 TV network used from 1985 to 1991Code Optimization Ware, as used in the game Tron 2.0Cold workedCollege of WoosterCommanding Officer's WifeCopy-on-writeCost of warCrude oil washing See more at Wikipedia.org...