The U.S. Geological Survey photo contest "Earth As Art" features five beautiful photos of Alaska, and now is the time to vote on your favorites.

To celebrate the 40th Anniversary of the Landsat Program on July 23, 2012, we'd like your help in selecting the top 5 "Earth as Art" images from the more than 120 scenes in our collection.

For 40 years Landsat satellites have been acquiring images of the land cover of the planet. The satellites have given us spectacular views of mountains, valleys, coastal areas, islands, volcanic fields, forests, and patterns on the landscape.

By highlighting some of those features and creatively crafting the colors we have developed a series of "Earth as Art" perspectives that reveal the artistic side of Landsat. The Top 5 "Earth as Art" images will be announced on July 23 in Washington, D.C., at a special event commemorating the launch of the first Landsat satellite.