What is Earth Observation?

Quite simply put, Earth Observation is the science of gathering information about the Earth. But, why is collecting information about earth important? We need to understand how the earth works, changes it is going through. Be it short term changes like - Change in the weather Or Long term changes impacting our climate such as Air Pollution, Deforestation, Melting of Glaciers, Rising Sea level and many more. Satellites can cover the entire planet and monitor it on a regular basis, again and again. Satellites can collect information that’s not visible to naked eyes such as moisture in the soil, salinity of oceans etc. Satellites can also collect visual information about a forest fire, floods or changes in the sea level. It can help governments respond quickly to disasters and emergencies. It can also be used to plan our cities. More than 650 Earth Observation satellites are there in the sky.