2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/13854We briefly review and extend our discussion of the ROSAT detection of the extraordinarily luminous (> 10^{42} erg/s) partly extended (> 30 kpc diameter) X-ray emission from the ultraluminous infrared galaxy NGC 6240. The `standard'-model of starburst outflow is contrasted with alternatives and a comparison with the X-ray properties of ellipticals is performed.6 pages incl. 2 figures, uses crckapb.sty. To appear in the proc. of the Ringberg workshop on "Ultraluminous Galaxies: Monsters or Babies" (Ringberg castle, Sept. 1998), Ap&SS, in press; preprint and related papers also available at http://www.xray.mpe.mpg.de/~skomossa/Astrophysicstext