In order to celebrate Earth Day 2016 , NASA has posted some of the most beautiful pictures of our planet Earth .

Adele Island, off Australia’s north coast, a tiny island with many concentric zones around it. 2.9 km long only, but the entire tidal zone with all the concentric zones is 24.5 km (15.2 mi) long, surrounded by extensive sandbanks in the tidally exposed area.

NASA-Australia-Island-600x399

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