Joining in the annual celebration of Earth Day 2011 and helping in the better understanding of the planet is NASA with its continuous stream of iconic images from 13 of its Earth-orbiting satellites.

The agency is showcasing inspiring views of the planet taken with the help of its advanced scientific spacecrafts.

Throughout the years, NASA has dedicated towards unraveling the complex factors that drive Earth's climate system and providing far-reaching benefits to society in areas such as disaster management, weather forecasting and agriculture.

Some of the agency's most popular Earth images are those taken during earthquakes and other natural disasters. Start the slideshow to get a glimpse of the some of the most iconic NASA images of the Earth: