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France
Les fontaines des jardins du château de Versailles (parterre d'Eau).
Matter
Nitrogen dioxide (NO2) on the left and dinitrogen tetroxide (N2O4) on the right.
Air
Oxygen content of the atmosphere over the last billion years
Air
Blue light is scattered more than other wavelengths by the gases in the atmosphere, surrounding Earth in a visibly blue layer when seen...
Stars
Some of the well-known stars with their apparent colors and relative sizes.
Stars
People have interpreted patterns and images in the stars since ancient times. This 1690 depiction of the constellation of Leo, the lion,...
Scientists
Thomas Young, the first person to use the term "energy" in the modern sense.
Sun
During certain atmospheric conditions, the Sun becomes clearly visible to the naked eye, and can be observed without stress to the eyes.
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