Cloud
In meteorology, a cloud is a visible mass of liquid droplets or frozen crystals made of water or various chemicals suspended in the atmosphere above the surface of a planetary body. These suspended particles are also known as aerosols. Clouds in earth's atmosphere are studied in the cloud physics branch of meteorology. Two processes, possibly acting together, can lead to air becoming saturated; cooling the air or adding water vapor to the air. In general, precipitation will fall to the surface; an exception is virga, which evaporates before reaching the surface.
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Famous quotes containing the word cloud:
“Hearing the low sound
of a cloud scattering rain
at midnight
and thinking for an eternity
on his absent young wife,
a traveller heaved a sigh
and with a flood of tears
howled the whole night long.
Now, villagers won’t let him stay
in their place anymore.”
—Amaru (c. seventh century A.D.)
“Hast ‘ou fashioned so airy a mood
To draw up leaf from the root?
Hast ‘ou found a cloud so light
As seemed neither mist nor shade?”
—Ezra Pound (1885–1972)
“A brush had left a crooked stroke
Of what was either cloud or smoke
From north to south across the blue;
A piercing little star was through.”
—Robert Frost (1874–1963)