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:
“O months of blossoming, months of transfigurations,
May without cloud and June stabbed to the heart,
I shall not ever forget the lilacs or the roses
Nor those the spring has kept folded away apart.”
—Louis Aragon (1897–1982)
“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)
“You say, “It is dark.” And in truth, I did place a cloud before your sun. But do you not see how the edges of the cloud are already glowing and turning light.”
—Friedrich Nietzsche (1844–1900)