Launched on 18 December, 1999, Terra is the flagship of Nasa's Earth Observing System series of satellites.
BBC: Earthshine map helps predict weather
Terra was launched on 18 December 1999 and is regarded as the flagship of Nasa's Earth Observing System series of satellites.
BBC: How Earth's land is used
The committee found that the number of NASA and NOAA Earth observing instruments in space is likely to decline to as little as 25 percent of the current number by 2020.
FORBES: Losing NASA's Eyes in the Sky
In doing so, he brings the giants of modernism down to earth, observing their sweat and strain as if in the same room.
ECONOMIST: The wonders and mess of the 20th century on the page
The telescope was launched almost four years ago and sent to an observing position 1.5 million km from Earth.
BBC: Herschel space telescope to go blind
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