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.
无人代替
- 2025-12-07T00:00:00.000000Z
浅影
- 2025-12-03T00:00:00.000000Z
泪
- 2025-08-22T00:00:00.000000Z
灰色系
- 2025-04-09T00:00:00.000000Z
爱好难
- 2025-03-17T00:00:00.000000Z
春
- 2025-03-05T00:00:00.000000Z
告别更像是告白
- 2025-03-04T00:00:00.000000Z
光
- 2025-02-27T00:00:00.000000Z
泪
- 2025-02-13T00:00:00.000000Z
梦与实的交响
- 2025-01-02T00:00:00.000000Z
冰冷的心
- 2024-12-20T00:00:00.000000Z
爱着你
- 2024-12-17T00:00:00.000000Z
就忘了吧
- 2024-12-12T00:00:00.000000Z
Crazy
- 2024-10-02T00:00:00.000000Z
救赎
- 2024-09-20T00:00:00.000000Z
我的鲜活和有趣开始变老
- 2024-09-14T00:00:00.000000Z
亲爱的自己 我不太明白你
- 2024-09-02T00:00:00.000000Z
雷雨天
- 2024-08-05T00:00:00.000000Z
我的爱是被囚禁的蝴蝶
- 2024-06-08T00:00:00.000000Z
月光
- 2024-05-27T00:00:00.000000Z
大黑山下
- 2024-05-21T00:00:00.000000Z
Baby Don‘t Cry
- 2024-05-08T00:00:00.000000Z
失去的爱
- 2024-04-23T00:00:00.000000Z
水瓶座
- 2024-03-05T00:00:00.000000Z
幻
- 2024-02-01T00:00:00.000000Z
Similar Artists