Direct quote: “At Sedna’s distance, temperatures would not get higher than 400 degrees below zero Fahrenheit (-280 degrees Celsius), making it the coldest known celestial body in the solar system, Brown told journalists.”
… Wait a minute… Isn’t absolute zero 273.16 degrees below 0 Celsius? Either I didn’t understand something about absolute zero or absolute zero isn’t really absolute zero… or this is just a mis-quote/mis-print.
Looks like a shoddy rounding of figures to me. We were always told to do that when I worked on a newspaper: Joe Public being too dim to understand fiddly numbers, everything was changed to BIIIG ROUUND ones… and while an individual writer might be smart enough to know which figures shouldn’t be rounded (years, for example) every article passed through the claws of at least half a dozen sub editors who’d chew it up by insisting on the dumbest of rules in the most inappropriate places.