Earth Globe
Africa, Europe & Asia
Image Credit: NASA
Without the light from the Sun shining upon it, our Earth appears like a dark disk. This shroud of darkness falls every 24 hours as the Earth spins on its axis. The Sun's light rises in the east and eventually fades below the horizon in the west, ushering in night. There are still many places around the globe where our view of the night skies is unimpeded. However, in many urban, suburban, and even rural areas, artificial lighting and industrial development drown out the light from distant cosmic objects.
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