The first Landsat satellite was launched in 1972.

Since 1972, Landsat satellites have collected information about Earth from space.

The instruments on the Landsat satellites have acquired millions of images.

Scientists said the images were taken by the government's Landsat 7 satellite.

The changes are documented in this series of natural-color images from the Landsat 5 satellite between 1999 and 2011.

The regulations carry out a provision of the 1984 law that put the American Landsat satellites into private hands.

It was discovered in 1976 during the analysis of imagery from the Landsat 1 satellite.

In 1976, a Canadian coastal survey was carried out using data from the Landsat 1 satellite.

These images, taken by the Landsat satellites, contrast 1989 and 2011.

The first of five Landsat satellite was orbited in 1972.