When you look up at the sky, thousands of stars twinkle, but only one dominates our daily lives—the Sun. As a G-type main-sequence star (yellow dwarf), the Sun is the closest star to Earth and is ...

Update 24 June 2010: After reporting in April that a “dark sun” named UGPS 0722-05 was the closest brown dwarf to planet Earth ever found (see below), researchers led by Philip Lucas of the University ...