This distant planet orbits its Sun-like host star ... mass of Earth and having a radius approximately five times larger than ...

It is believed that it might be an icy or gas planet, around seven times the size of Earth. This would make it much bigger than Pluto, which is smaller than the planets we know. The idea of Planet ...

Planet Nine", dubbed, has fascinated scientists for its ability to account for "anomalous" motions of objects located faraway ...

Moving at roughly 20,505 miles per hour along the distant world's equator, it’s the fastest known jet stream that wraps ...

Mars will be at perigee, its closest point to Earth, on Sunday, Jan. 12, appearing bigger and brighter in the sky. Here’s how to view the Red Planet at its best for 2025.

Smaller gas giants are less likely to survive in such systems, surrounded by clashing planetary titans. With their lower ...

Earth-like exoplanets (planets orbiting stars other than our sun) with oceans, lakes and rivers are thought to be unlikely, but the work reveals that many stars will harbor geological conditions ...