WASP-121b is like nothing in the solar system, raining liquid metal and being puffy like a marshmallow. The origins of these "toasted marshmallow" planets could be more complicated than thought.
Wrinkle ridges that formed in the past 160 million years suggest recent geological activity on the moon.
The next Sputnik Moment will take place against the backdrop of great power competition, as it did in the 1950s. This time, the top contenders are the U.S. and China.
Uncontrolled space debris reentries are of growing concern for air traffic, as SpaceX's recent Starship Flight 7 showed.
There are many obstacles to overcome before humans can set foot on Mars, including problems surrounding launch mass and closed-loop systems and the hazards of space radiation.
For 366 days, six analog astronauts lived and worked in a sealed environment in Russia, an Earth-based stand-in for interplanetary missions of the future.
Black holes that have been obscured by clouds of dust still emit infrared light, enabling astronomers to spot them for the very first time
February brings a rare planetary parade, with five bright planets in clear view and a special alignment of Mercury and Saturn on Feb. 24.
NASA's Juno spacecraft has spotted the most powerful volcanic eruption ever seen on the solar system's most volcanic body, the Jovian moon Io.
SPHEREx is slated to launch Feb. 27 on a SpaceX rocket. It is meant to map the entire night sky in infrared — something even the JWST can't exactly do.
