Sky - online puzzles


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 Qilian Mountains online puzzlecouple at the peak facing mountain online puzzlebrown rocky mountain under white cloudy sky during daytime sliding puzzle onlineOneTwoThree sliding puzzle onlineIsabelle sliding puzzle onlinelandscape - perfect morning sliding puzzle onlineblack and gray bird on brown tree branch during daytime online puzzleboy in blue and yellow button up shirt with brown hat sliding puzzle online✨ DAILY ACTIVITY✨ online puzzleMooCowSlide online puzzlewhite and brown concrete building on top of green mountain online puzzleOn the Islands of Fiji sliding puzzle onlineSunrise sliding puzzle onlineVenice on the water online puzzlegreen trees on mountain during daytime online puzzlechichen itza easy slide sliding puzzle onlineEaster blooms online puzzleStars above Zihuatanejo sliding puzzle onlinesilhouette of lighthouse on beach during sunset sliding puzzle onlineAdirondack Survivor Season 1 online puzzle2B Surv - HII1 sliding puzzle onlineSpace with X-ORG sliding puzzle onlinegeren mountain slope scenery online puzzleMorbihan, France sliding puzzle onlinelandscape - lakes sliding puzzle onlinebrown and black concrete building sliding puzzle onlinewhite concrete building near green trees during daytime online puzzlesouthern peru sliding puzzle onlinegroup of people playing basketball during daytime sliding puzzle onlinepeople walking on street near white concrete building online puzzlegreen grass field under white clouds during daytime sliding puzzle onlinebrown concrete building near body of water during night time online puzzlewhite and brown concrete building near body of water online puzzlegreen grass near body of water during daytime online puzzleThe Oyster Seller' by Jacob Van Stry & JP Schoenma online puzzleIguazu Falls sliding puzzle onlineHawaii ................. online puzzleTAJ MAHAL TARZ3 online puzzleHappy New Year, Hogwarts online puzzleHustle and bustle sliding puzzle onlineaerial view of city near mountain during daytime online puzzlegreen grass field with trees under blue sky during daytime sliding puzzle onlinewhite and brown concrete building near body of water sliding puzzle onlinegreen grass field near mountain under blue sky online puzzleOld railway station online puzzlebrown concrete building under blue sky during daytime sliding puzzle onlineThe fear of a wise man sliding puzzle onlineChris' BB S1 Logo sliding puzzle online