What Is Remote Sensing?

Remote sensing refers to the gathering of useful information from a distance. Today it is normally used to describe measuring things on Earth using instruments located in space, either on the space station or on satellites.

Space probes have also collected and sent back much useful information about different planets; the voyager space probes have now left the Solar System and are giving us information and images about what lies beyond this significant boundary.

Satellites such as Landsat have surveyed all of the Earth's surface from their orbit. New methods of measuring carbon dioxide uptake over the Earth's surface are now giving us important information about how the planet will respond to the increase in carbon dioxide levels caused by human industrial activity over the last 200 years. This has already found that big forests do not take up as much excess carbon dioxide as had been hoped, making international efforts to reduce carbon dioxide production even more important.

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