QSOs, providing distant, luminous sources of radiation, provide a means to detect gas by absorption in the interstellar and intergalactic medium. Of particular interest to astronomers studying metal line systems in lines of sight to QSOs are the...
"One of Dali's most Freudian paintings. Indeed, the elderly gentleman helping the lady in distress seems to be Freud himself, borrowed from [Max] Ernst's Pietà or Revolution by Night." (Caption); "Illumined Pleasures is one Dali's...