Has 'Planet X' Finally Been Found? A Cautionary Tale

Artist’s conception of Planet Nine. The new evidence is the best so far that a massive planet exists far past Neptune in the outer Solar System. Image Credit: Caltech/R. Hurt (IPAC)

For a long time now, there have been theories and rumors regarding the possible existence of another planet in our Solar System, […]

Five Weeks to Pluto: The Strange Discovery of Planet X and a World Like No Other (Part 1)

Artist’s concept of NASA’s New Horizons spacecraft during closest approach to Pluto on July 14. Image Credit: Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute (JHUAPL/SwRI)

In the dark, outer reaches of the Sun’s realm lies a world unlike any other. Discovered in the spring of 1930, Pluto—named by an Oxford schoolgirl, who […]

The Continuing Saga of Planet X: Could More Massive Planets Hide Beyond Pluto?

An artist’s impression of Eris, the most massive dwarf planet known to date, with an aphelion of 97 AU from the Sun. Could bigger Super-Earth-type planets be orbiting even farther out? Image Credit: ESO/L. Calçada and Nick Risinger

 

Just like the proverbial cat with nine lives, the notion of an unseen planet […]

Putting an End to the Planet X Saga? Latest Search for Hypothetical Planet at Edge of Solar System Comes Up Empty

The notion of Planet X, a hypothetical massive planet orbiting the Sun beyond the known reaches of the Solar System, has held great appeal for the general public for many decades. The newest results from NASA’s WISE mission, however, indicate that no such planet exists. Image Credit: Warner Bros.

 

Deeply ingrained in […]