A 24-year-old observatory assistant from the Midwest discovered Pluto. Clyde Tombaugh, born in 1906 in Streator, Illinois, ...

Planets form from disks of gas and dust around young stars, but the gas needed for growth does not last forever. New ...

Research findings are available online in the journal arXiv. The original story " Astronomers find an ultra-dense mega-Earth ...

Picture a star, about half the sun’s mass shining with a dim red light. Lumbering around it on a 5,000-year orbit is a huge ...

Two continent-sized structures deep inside Earth may contain remnants of Theia, the ancient planet thought to have collided ...

Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. The four planet-strong “planet parade” — mistakenly called a ...

Take a look around wherever you’re sitting. Your phone, the walls, the air, your own body. None of the material in any of it ...

Unpopular opinion time, Pluto being reclassified as a dwarf planet was a great thing for our understanding of the solar ...

A celestial phenomenon is forming in the Northern Hemisphere on Friday, as seven planets are expected to appear lined up in the night sky. Most are expected to be visible to the naked eye, though not ...