The Landsat program involves a series of successive satellites that each take tens of thousands of pictures of Earth over their life time.
The first Landsat satellite was launched into orbit in 1972, which makes the Landsat program the longest-running project to collect photos of Earth from space.
In total, the Landsat satellites have acquired millions of images of Earth that provide an unprecedented look at how the face of our planet is changing in recent decades.
NASA launched the latest member of the team, Landsat 8, into orbit on February 11, 2013. It is the most advanced Landsat satellite, yet, according to the mission's officials.
With powerful cameras on board, Landsat 8 can resolve a region of Earth as small as 100 feet long. This means the satellite can take a clear picture of a baseball field, which is impressive considering the satellite orbits 438 miles above Earth's surface.
At this height Landsat 8 moves at about 4.7 miles per second and orbits Earth 15 times each day. Between Landsat 8 and the still-operational Landsat 7, the two satellites observe every spot on the globe at least once every eight days.From space, the Grand Canyon looks like a treacherous crack across Earth's surface.
This glacial chunk has almost completely detached from the larger Antarctic Pine Island Glacier and is large enough to fit 8 Manhattan-sized cities on it.
This false-colored image of Western Australia shows sediment and nutrient flow patterns (blue/yellow/red) in the mouth of a nearby river.
One of the largest landslides of this decade took place last February in southeastern Alaska. The landslide involved 68 million metric tons of material, and the aftermath is shown here by the brown streak smeared across the snowy background.
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