Feb. 18 marks the 95th anniversary of the discovery of our outermost planet-not-planet. Here's what to know about the short life of what was, for a single human lifetime, the solar system's ...

The possibility of a "major planet" in the star's habitable zone is exciting, but he stressed such a planet is not yet confirmed. Farihi said his team still needs more evidence, which may be ...

New Horizons spacecraft survives trip 1 billion miles beyond Pluto 02:03. It's an evocative idea that has long bedeviled scientists: a huge and mysterious planet is lurking in the darkness at the ...

The James Webb Space Telescope investigated a giant planet, K2-18b, that could be an ocean world, according to NASA. The exoplanet lies 120 light-years away from Earth.

Unfortunately no planet unveiled itself in the data. Taken together with the DES and ZTF surveys (and accounting for overlaps in coverage), the astronomers have now eliminated 78 percent of P9’s ...