Usually when people observe hot gas coming out of something, they are watching a politician deliver a speech. Astronomers have found objects that do the same thing but in a far more spectacular fashion. Quasars...

At 1 a.m., Paul Smith might be the only one playing Bach’s Brandenburg Concerto No. 1 at nearly full volume on Mount Lemmon.The piece has a happier tone than the 19th-century Russian and German composers...