Terra
Terra is a multi-national, multi-disciplinary mission involving partnerships with the aerospace agencies of Canada and Japan. Managed by NASA’s Goddard Space Flight Center, the mission also receives key contributions from the Jet Propulsion Laboratory and Langley Research Center. Terra is an important part of NASA’s Science Mission, helping us better understand and protect our home planet.

Featured Image
Sediment off the Yucatan Peninsula

Larger image (2 MB, JPEG, opens in a new window)

A burst of color lit the shallow waters of the Gulf of Mexico off the Yucatan Peninsula on December 14, 2008, when the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Terra satellite captured this image. The swirls of tan, green, blue, and white are most likely sediment in the water. The sediment scatters light, giving the water its color. The sediment comes from two sources: the land and the sea floor. Some of the color may also come from phytoplankton, tiny plant-like organisms that live in the sun-lit surface waters of the ocean.

Near the shore, the water is tan where rivers carry dirt from land to the ocean. As the sediment disperses, the water fades to green and then black. To the north, the water is more blue and white than tan and green. In these regions, the sediment has likely come from the sea floor. Made up of chalky white calcium carbonate from shell-building marine life like coral, sea floor sediment gives the water a white or bright blue color. The sediment was probably brought to the surface in shallow waters by strong waves. A few days before the image was taken, strong winds churned the Gulf. The blue-green cloud in this image roughly matches the extent of the shallow continental shelf west of the peninsula.

NASA image courtesy the MODIS Rapid Response Team at NASA GSFC, which provides daily images of the Yucatan Peninsula. Caption by Holli Riebeek.

Status Update
August 17 - 23, 2007

(Last Updated 24 August 2007)

Podcasts
Terra Podcasts are courtesy of EarthSky.org.

Ilan Koren on smoke and clouds over the Amazon
January 6, 2009
Download (mp3, 7.32MB)

Jean-Phillippe Avouac on earthquakes
December 15, 2008
Download (mp3, 9.14MB)

Diane Davies on a wildfire alert system
December 8, 2008
Download (mp3, 9.14MB)

Podcast Archive
(Links on this page may leave this site and connect to a non-NASA resource).

Features

Terra images available in

Or, visit the individual instrument galleries: ASTER / CERES / MISR / MODIS / MOPITT

 + NASA Privacy Statement, Disclaimer,
and Accessibility Certification