Not too long ago, a satellite was something travelling space around the earth and doing things we didn't fully comprehend. Now, we can actually have access to a satellite photo of just about any area on earth. It can be quite useful for scientists to keep watch on variable climate changes affecting our planet. A satellite image can be as clear as a regular digital picture and show a wide variety of things we would not otherwise notice.
Satellite weather images can warn us of forming tornadoes, or any kind of storm heading one way or another. These satellite images are now shown on television in order to explain to the public the different cloud and wind formations that affect our climate in the short term. Satellite photos are taken and beamed right back to earth in an instant and can be used rapidly. Satellite maps are also very precise when it comes down to mapping areas of countries. A satellite view does actually show the expansion of the Sahara when the same pics are taken at different intervals.
daizisheng 2007-09-20 06:42:53