NASA Image of the Day

Everyone knows that NASA (the National Aeronautics and Space Administration) explores space, but its explorations of the earth are equally important. Fortunately, the Earth Observatory at NASA makes it easy for internet users to get an idea of the variety of ways in which NASA helps scientists, students, and the general public to learn about the earth, through its Image of the Day (IOTD) web site.

Each day, a different image is featured. The images are at a variety of scales, ranging in coverage from a single city or river delta to  a continent to the entire planet or more. Each image is accompanied by a brief explanation, and often by a few more images that complete the story. The sampling above gives an idea of the variety of topics covered by IOTD and by NASA in general.

Users can check the web site each day or subscribe to the IOTD program by email.