Latest Definition of planet Stories
By Alan Crosby PRAGUE (Reuters) - The question of whether Pluto is a real planet, hotly debated by scientists for decades, came to a head on Wednesday when the global astronomers' body proposed a definition of a planet that raises their number to 12 from nine.
The universe really is expanding - astronomers are proposing to rewrite the textbooks to say that our solar system has 12 planets rather than the nine memorized by generations of schoolchildren.
Scientists have to agree on a universal definition for what qualifies as a planet, the head of a global astronomy organization said Tuesday, as scientists debate the future designation of Pluto.
By Alan Crosby PRAGUE (Reuters) - Despite being the farthest planet from Earth in our solar system, Pluto has come under attack from astronomers and may be about to lose its status in the battle.
Despite being the farthest planet from Earth in our solar system, Pluto has come under attack from astronomers and may be about to lose its status in the battle.
Too lightweight to be stars but bigger than most planets, a handful of hot young free-floating objects have the raw materials to make their own mini-planetary systems, astronomers reported on Monday.
For the first time, astronomers have succeeded in weighing a binary pair of brown dwarfs and precisely measuring their diameters. These kinds of exact measurements are not possible when observing a single brown dwarf.
Scientists say they have confirmed that a so-called 10th planet discovered last year is bigger than Pluto, but that likely won't quell the debate over what makes a planet.
Common wisdom among astronomers holds that most star systems in the Milky Way are multiple, consisting of two or more stars in orbit around each other. Common wisdom is wrong. This means planets may be more common than previously suspected.
Astronomers have spotted a swirling debris cloud around a sun-like star where terrestrial planets similar to Earth may be forming in a process that could shed light on the birth of the solar system.