Astronomers have discovered not one, but four tiny planets orbiting Barnard’s Star, our cosmic neighbor. These planets, each about a fifth the mass of Earth, whip around their host star in just ...

Astronomers have been looking for exoplanets orbiting Barnard's Star, the nearest solitary star to Earth at just 5.96 ...

The four exoplanets orbit Barnard’s Star so closely that their years last only a few Earth days. They are probably rocky and, ...

The ringed gas giant Saturn has officially replaced Jupiter as the planet in our solar system with the most moons. The ...

Earth’s climate over millions of years is shaped by both internal forces, like volcanic activity, and external ones, such as ...

Astronomers have revealed new evidence that there are not just one but four tiny planets circling around Barnard's Star, the second-nearest star system to Earth.

A new study presents a compelling new model for the formation of super-Earths and mini-Neptunes -- planets that are 1 to 4 times the size of Earth and among the most common in our galaxy. Using ...

Mercury: The smallest and innermost planet in our solar system. It's a rocky, cratered world with a thin atmosphere. Venus: Often called Earth's "twin" due to its similar size and mass, Venus has a ...