Imaginea zilei din astronomie - APOD (Astronomy Picture Of the Day)

Descoperă cosmosul! În fiecare zi apare o nouă imagine sau fotografie din universul nostru fascinant împreună cu o scurtă explicaţie scrisă de către un astronom profesionist.

24 Aprilie 2017

A White Battle in the Black Sea
Credit Imagine: NASA, Aqua, MODIS

Explicaţie: Trillions have died in the Earth's seas. Calcified shields of the dead already make up the white cliffs of Dover. The battle between ball-shaped light-colored single-celled plants -- phytoplankton called coccolithophores -- and even smaller, diamond-shaped viruses dubbed coccolithoviruses -- has raged for tens of millions of years. To help fight this battle, the coccolithophores create their chalky armor by absorbing carbon dioxide from the atmosphere. This battle is so epic that coccolithophores actually remove a significant fraction of Earth's atmospheric carbon dioxide, bolstering the breathability of air for animals including humans. Pictured in this 2012 image from NASA's Aqua satellite, the Black Sea was turned light blue by coccolithophore blooms.

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Autori & editori: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)
Oficial NASA: Phillip Newman Se aplică drepturi specifice.
Politica de confidenţialitate web a NASA şi anunţuri importante
Un serviciu al: ASD la NASA / GSFC
& Michigan Tech. U.