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22
AprEarth Day
April 22, Earth Day, is celebrated around the world as tens of millions of people make time to attend their environment. Thousands of governments – from local to regional to state, provincial or federal – plan awareness campaigns and activities … Continue reading →
12
AprInternational Day
of Human Space FlightOn April 12, 1961, Soviet cosmonaut Yuri Gagarin became the first person to travel into space. He made a 108-minute orbital flight in the fully automated Vostok 1 space capsule. Gagarin did not land in his space capsule. Vostok … Continue reading →
Tag Archives: GRACE
The GRACE Twins
On March 17, 2002, NASA launched the GRACE twins, two Gravity Recovery and Climate Experiment satellites. They flew about 220 km ( 137 mi ) apart in a polar orbit at 485 km (300 mi) above Earth, measuring regional … Continue reading
Posted in On This Day
Tagged Earth gravity fields, freshwater measurement, GRACE, groundwater, March 17, On This Day, The Roberta Bondar Foundation
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