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

These unusual ideas included a deep pit under the planet and a top-secret military ... These trees are dark green, but in such a high concentration, they look much darker from low Earth orbit, ...

Scientists have used the wobble of the Milky Way and what are known as "cosmic lighthouses" to shine a light on the mystery ...

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 ...

For a few evenings around 28 February, every planet in the solar system will be visible in the night sky, thanks to a rare ...

A total lunar eclipse is a relatively rare astronomical event because the moon usually passes above or below Earth’s shadow ...