Imaginea Astronomica a Zilei

Descopera cosmosul! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.

October 7, 1998
See Explanation.  Clicking on the picture will download 
 the highest resolution version available. See Explanation.  Clicking on the picture will download 
 the highest resolution version available.

Ocean Planet Pole To Pole
Credit: SeaWiFS Project, ORBIMAGE, GSFC, NASA

Explicatie: (Edit) The Sea-viewing Wide Field-of-view Sensor (SeaWiFS) instrument onboard the orbiting SeaStar spacecraft can map subtle differences in Earth's ocean color. These North (left) and South Pole projections are based on SeaWiFS measurements made between September 1997 and July 1998. The "color" strongly depends on how sunlight is reflected by free-floating phytoplankton - photosynthesizing organisms which contain chlorophyll. Chlorophyll absorbs blue and red light and reflects green. Since the tiny phytoplankton are tremendously important, forming the beginning of the food chain for sea life, SeaWiFS color maps can help track the activity of ocean planet Earth's biosphere.

Imaginea de maine: Farside


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Autori & editori: Robert Nemiroff (MTU) & Jerry Bonnell (USRA)
Reprezentanti tehnici NASA: Jay Norris. Specific rights apply.
Un serviciu al: LHEA at NASA/ GSFC
&: Michigan Tech. U.