Sky
everything that is above the surface of
the Earth
The sky is the appearance of the atmosphere around the surface of the planet from our
point of view. We see many objects that are actually in space such as the Sun, the Moon,
and stars because they are in the sky. On a clear day the sky appears blue. At night it
appears. The deepness of the blue increases as we look toward the horizon, and up to the
point above us.
The daytime sky with trees.
Colors of the sky at different times
Sunset in London
The sky, which is made up of gas molecules, is blue because of the random scattering of
sunlight by the molecules. Rayleigh scattering defines the amount of scattering of light rays.
Blue light scatters much more than red, which is why the sky appears blue on a clear day.
Depending on the time of day, the sky may appear different colors. At dawn or dusk the sky
may appear red, orange, or even green and purple depending on how low the sun is and
how close it is to night.
Other planets have skies too. Because the types of gases in their atmospheres are different,
they have different sky colors. For example, the sky on Mars is red.[1]
Many things can be seen in the sky. There are objects from space like the Sun, Moon, and
stars. There are also many weather events seen in the sky. For example, these can be
clouds, rain, lightning, or fog. Weather is caused by different patterns and temperatures in
the atmosphere. Other things that can be seen in the sky are birds, other flying animals, and
aircraft.
Other websites
Day Sky Images (http://www.rayching.co.nz/sky.htm)
Archived (https://web.archive.or
g/web/20070815121431/http://www.rayching.co.nz/sky.htm)
2007-08-15 at the
Wayback Machine
Night Sky Images (http://www.astronomy.net.nz/)
eb/20190119030529/http://www.astronomy.net.nz/)
Archived (https://web.archive.org/w
2019-01-19 at the Wayback
Machine
Sky Photo Gallery (http://www.hanifworld.com/Sky.htm)
Archived (https://web.archiv
e.org/web/20070430121713/http://www.hanifworld.com/Sky.htm)
2007-04-30 at the
Wayback Machine
Why is the sky blue? (http://math.ucr.edu/home/baez/physics/General/BlueSky/blue_sk
y.html)
References
1. "Mars Mobile" (https://web.archive.org/web/20190418135227/https://marsmobile.jpl.nasa.gov/
msl/multimedia/images/) . marsmobile.jpl.nasa.gov. Archived from the original (https://marsm
obile.jpl.nasa.gov/msl/multimedia/images/)
on 2019-04-18. Retrieved 2019-01-04.
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Last edited 8 hours ago by Hockeycatcat