text:  as opposed to nearly 80 for Halley's Comet. Olbers will most likely be appearing within the constellation Lynx. Eben Brown, Fox News. Fox's Jeff Manasso reports teachers in Chicago could soon be walking a picket line. The Chicago Teachers Union's contract expires today amid months of negotiations between the city and teacher demands, hundreds of them that includes higher pay for teachers and staff, smaller class sizes, and that the city pay for affordable housing.