Since its launch on the web in April 1999, NASA Earth Observatory has published more than 15,500 image-driven stories about our planet. In celebration of our 20th anniversary -- as well as the 50th anniversary of Earth Day -- we want you to help us choose our all-time best image.
Step Up Close to the “Labrador Traps”
Aerial and ground-based photos reveal the patterns and details in northeastern Canada's flood basalts.
February EO Satellite Puzzler
Every month we offer a puzzling satellite image. Your challenge is to tell us what we are looking at, where it is, and why it is interesting.
Taal Volcano remains on Level 4 alert, but what does that mean?
Since its initial eruption, Taal remains on a level 4 alert, with a hazardous eruption still possible.
Tweeting the Extreme Summer Down Under
More jaw-dropping images of the extreme weather in Australia have come in from astronauts and satellites.
Smoky Australian Skies
As satellites track Australian wildfire smoke from above, GLOBE Observer citizen scientists have been keeping tabs on hazy skies from the ground.
January Puzzler
Your challenge is to use the comments section to tell us what we are looking at, where it is, and why it is interesting.
December Puzzler
Your challenge is to use the comments section to tell us what we are looking at, where it is, and why it is interesting.
Terra Turns Twenty
Satellites like Terra have given scientists a detailed view of Earth that didn't exist 20 years ago.