00:00On this day in space.
00:04In 1999, NASA launched its flagship Terra satellite into Earth's orbit to collect data
00:08about our planet's changing climate. Terra contains five different sensors
00:12that monitor the Earth's atmosphere, lands, oceans, and radiant energy.
00:16The satellite takes several different kinds of measurements that reveal how the Earth is changing over time.
00:20It also tracks the spread of air pollution.
00:24It lifted off from Vandenberg Air Force Base in California on a United Launch Alliance Atlas II
00:28rocket and is still in operation today.
00:32And that's what happened on this day in space.
00:36NASA Jet Propulsion Laboratory, California Institute of Technology
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