Imaginea Astronomica a Zilei

Descopera cosmosul! In fiecare zi este prezentata o noua imagine sau fotografie a universului nostru fascinant, insotita de o explicatie scurta din partea unui astronom profesionist.

2000 March 6
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Abell 2142: Clash of the Galaxy Clusters
Credit: Maxim Markevitch (CfA), ACIS, SAO, CXC, Chandra, NASA

Explicatie: (Edit) Over the course of billions of years, whole clusters of galaxies merge. Above is an X-ray image of Abell 2142, the result of the collision of two huge clusters of galaxies, and one of the most massive objects known in the universe. This false-color image shows a concentration of gas 50 million degrees hot near the center of the resulting cluster. Oddly, it is the relative coldness of the gas that makes this situation particularly interesting. The center of Abell 2142 is surrounded by gas fully twice as hot, a temperature thought to have been created by energy released during the colossal collision. Still, since we can only see a snapshot in time, much remains unknown about how clusters of galaxies form and coalesce.

Imaginea de maine: Zal Patera on Io

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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.