A disappearing plane and a disease's sudden spread. Legalizations, celebrations â and the inexplicable attraction of a dumped bucket of ice water. These are some of the stories that dominated 2014. Now we want your choices.
The brightest star, as viewed from Earth, is Sirius, and it appears bluish-white to the human eye. It is classified as an A1Vm star and shares the color spectrum with other class-A stars.
Computer illustration of the star Rigel. The color of a star comes from its temperature. The coolest stars appear red, while the hottest stars are blue. And for a star, the only thing that defines the temperature of a star is its mass.