Ergosphaera

Ergosphaera (ex Graeco ergon 'opus' + sphaera 'globus') in theoria relativitatis generalis est regio extra foramen nigrum revolvens, quae sic nominata est quia energia et massa ex foramine nigro hac in regione secundum doctrinam evellere possunt.

• http://nrumiano.free.fr/Estars/bh_thermo.html
• http://adsabs.harvard.edu/abs/2002astro.ph..3421W
• https://web.archive.org/web/20111017221919/http://www.daviddarling.info/encyclopedia/E/ergosphere.html
• http://astro.cornell.edu/academics/courses/astro201/ergosphere.htm