NASA on a space shuttle with large rocket boosters on a launch pad. The main shuttle is white with orange external tank and white boosters, with flames or ignition at the bottom.
To the robot who turned 90 days into 15 years of exploration:
You were, and are, the Opportunity of a lifetime.
Rest well, rover. Your mission is complete.
(2004-2019)
mars.nasa.gov
#ThanksOppy
Earth's magnetic shield has lost about 30% of its strength in just 3,000 years, and scientists think this might be the start of something big, a complete flip of our magnetic poles. Here's what's happening. Deep inside Earth, churning liquid metal creates our magnetic field, protecting us from harmful space radiation. But this field isn't stable.
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