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.
8 Februarie 2016
Explicaţie: What's happening behind those houses? Pictured here are not auroras but nearby light pillars, a nearby phenomenon that can appear as a distant one. In most places on Earth, a lucky viewer can see a Sun-pillar, a column of light appearing to extend up from the Sun caused by flat fluttering ice-crystals reflecting sunlight from the upper atmosphere. Usually these ice crystals evaporate before reaching the ground. During freezing temperatures, however, flat fluttering ice crystals may form near the ground in a form of light snow, sometimes known as a crystal fog. These ice crystals may then reflect ground lights in columns not unlike a Sun-pillar. The featured image was taken in Fort Wainwright near Fairbanks in central Alaska.
Autori & editori:
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.