Photos: 'Earth As Art' poll includes stunning views of Alaska

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Yukon Delta: After beginning in northern British Columbia and flowing through Yukon in Canada, the Yukon River crosses Alaska, USA, before emptying into the Bering Sea. Countless lakes, sloughs, and ponds are scattered throughout this scene of the Yukon Delta. The river's sinuous, branching waterways seem like blood vessels branching out to enclose an organ. It is one of the largest river deltas in the world, and currently (2010) protected as part of the Yukon Delta National Wildlife Refuge.

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.

The poll closes July 6. Select the Best "EARTH AS ART" Images.