Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.
2002 August 10
This is what the
looks like at night.
Can you find your favourite
Surprisingly, city lights make this task quite possible.
lights highlight particularly developed or
populated areas of the Earth's surface,
including the seaboards of Europe, the eastern
United States, and
Many large cities are located near
so that they can exchange goods cheaply by boat.
dark areas include the central parts of South America, Africa, Asia, and
The above image is actually a composite of
hundreds of pictures made by the orbiting
(Editor's note: This image has become an email-attachment phenomenon! It has also generated many print requests. Unfortunately, we do not sell prints. However, a high-resolution digital version of the image is available (click here or here).
Authors & editors:
Jerry Bonnell (USRA)
NASA Technical Rep.: Jay Norris. Specific rights apply.
A service of: LHEA at NASA/ GSFC
& Michigan Tech. U.