NASA Looks Back at 50 Years of Earth Day


It’s been five decades since Apollo 8 astronaut William Anders photographed Earth peaking over the Moon’s horizon. The iconic image, dubbed Earthrise, inspired a new appreciation of the fragility of our place in the universe. Two years later, Earth Day was born to honor our home planet. As the world prepares to commemorate the 50th anniversary of Earth Day, NASA reflects on how the continued growth of its fleet of Earth-observing satellites has sharpened our view of the planet’s climate, atmosphere, land, polar regions and oceans.

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Credit: NASA’s Goddard Space Flight Center/Scientific Visualization Studio


50 Years of Earth Day 1970 -2020

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Arctic Sea Ice Is the Thinnest and Youngest It’s Been in 60 Years


Working from a combination of satellite records and declassified submarine sonar data, NASA scientists have constructed a 60-year record of Arctic sea ice thickness.

Right now, Arctic sea ice is the youngest and thinnest its been since we started keeping records. More than 70 percent of… Continue reading “Arctic Sea Ice Is the Thinnest and Youngest It’s Been in 60 Years”