Sky - online puzzles

Sky

The sky is an unobstructed view upward from the surface of the Earth. It includes the atmosphere and outer space. It may also be considered a place between the ground and outer space, thus distinct from outer space.

In the field of astronomy, the sky is also called the celestial sphere. This is an abstract sphere, concentric to the Earth, on which the Sun, Moon, planets, and stars appear to be drifting. The celestial sphere is conventionally divided into designated areas called constellations.

Usually, the term sky informally refers to a perspective from the Earth's surface; however, the meaning and usage can vary. An observer on the surface of the Earth can see a small part of the sky, which resembles a dome (sometimes called the sky bowl) appearing flatter during the day than at night. In some cases, such as in discussing the weather, the sky refers to only the lower, denser layers of the atmosphere.

The daytime sky appears blue because air molecules scatter shorter wavelengths of sunlight more than longer ones (redder light). The night sky appears to be a mostly dark surface or region spangled with stars. The Sun and sometimes the Moon are visible in the daytime sky unless obscured by clouds. At night, the Moon, planets, and stars are similarly visible in the sky.

Some of the natural phenomena seen in the sky are clouds, rainbows, and aurorae. Lightning and precipitation are also visible in the sky. Certain birds and insects, as well as human inventions like aircraft and kites, can fly in the sky. Due to human activities, smog during the day and light pollution during the night are often seen above large cities.

The fear of a wise man sliding puzzle onlineChris' BB S1 Logo sliding puzzle onlinemonopoly sliding puzzle onlineman and woman with bone fire sitting on seashore sliding puzzle onlinePRESTIGE SURVIVOR GOOSEBUMPS online puzzlered and white flower garden sliding puzzle onlineCampitello di Fassa Italy sliding puzzle onlineSurvivor season 19 sliding puzzle onlineflorence, italy online puzzleyellow trees near mountain sliding puzzle onlinebrown concrete building under blue sky during daytime sliding puzzle onlinePlitvice Lakes in Croatia online puzzleDon Flamenco sliding puzzle onlineANime Puzzle online puzzleJOURNEY TO THE OTHER WORLD 13 sliding puzzle onlineAustrian Forest online puzzlegreen-leafed tree sliding puzzle onlinegolden gate bridge under blue sky during daytime online puzzlechallenge online puzzlewhite and brown 2 storey house sliding puzzle onlinegreen grass field near mountain under blue sky sliding puzzle onlineGM-8 INTENSELY sliding puzzle onlinecolorful buildings  online puzzleThe grave of Christ online puzzleTeam Comp sliding puzzle onlinegreen grass field near mountain under blue sky online puzzleScream the movie online puzzlecliff near body of water during daytime sliding puzzle onlineroad through the mountains sliding puzzle onlinebrown and white house near green trees sliding puzzle onlinebrown pathway between brown trees during daytime online puzzlebrown wolf on snow covered ground during daytime online puzzleMilan Cathedral sliding puzzle onlineMission to Mars online puzzlePart 2 HoH online puzzleSeason 6 slide Puzzle online puzzlepirin ................. sliding puzzle onlineporto, portugal online puzzleby Salley online puzzleReservoir, West Hartford, CT online puzzleautumn over the Bachkovo monastery sliding puzzle onlinesunset sliding puzzle onlineicy mountain and mountain scenery online puzzlegreen trees near body of water during daytime online puzzlebody of water during sunset sliding puzzle onlinePurple sky sliding puzzle onlineBuildings in Israel online puzzleFebruary 2 sliding puzzle online