Johnson also noted, "A stereotypical association of the colour of the smoke — white (positive) and black (negative) — lies behind the use of the two contrasting smoke colours." Over the years ...

Given the extreme angle at which it is viewed, astronomers are unsure if the Sombrero is a spiral galaxy or an elliptical galaxy. While it is packed with stars and hosts a supermassive black hole ...

Tradition holds that black smoke indicates the cardinals have not yet agreed on a new leader, while white smoke signals that a new Pope has been elected. But what kind of smoke is it exactly?