gravitatsiooni mõjul moodustuv lame, kiirelt pöörlevast ainest ketas tekkiva planeedi, noore tähe, valge kääbuse, neutrontähe, musta augu või muu taevakeha ümber
rotating disc of matter surrounding an astronomical object, such as a star, galactic nucleus, black hole etc., which is accumulated gravitationally by the object
Noovade puhul voolab vesinikurikas gaas tavalise tähe (punase kääbuse või hiiu) väliskihist valge kääbuse ümber tekkivasse akretsioonikettasse ja sealt lõpuks valge kääbuse pinnale.
This new visualization of a black hole illustrates how its gravity distorts our view, warping its surroundings as if seen in a carnival mirror. The visualization simulates the appearance of a black hole where infalling matter has collected into a thin, hot structure called an accretiondisc.
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