A:Super-Earths are rocky exoplanets with masses greater than Earth’s. But, in fact, there is no firm, agreed-upon definition for the mass range of these planets. Most studies consider planets with ...

Every time astronomers discover another exoplanet, the first thing we all want to know is “Does it look like Earth?” Finding an Earth-like exoplanet would dramatically increase our chances of finding ...

Puny particles have given scientists a glimpse inside the Earth. For the first time, physicists have measured the planet’s mass using neutrinos, minuscule subatomic particles that can pass straight ...

Despite being stuck on this rock tumbling through space all the time, we don't really know exactly how heavy that rock is, or how its mass is distributed. Of course, researchers have some pretty good ...