The faraway exoplanet could help provide answers as to why there are hardly any planets with twice the diameter of Earth.

As the extraordinary pace of astronomical discovery carries on, we increasingly see that the stuff of life is spread ...

There are a lot of satellites, and a lot of trash, around our planet — and the quantities are only going to get higher.

A group of astronauts whizzing around Earth from orbit are getting some pretty spectacular views of our planet's poles – and ...

What if water and hydrogen don’t stay separated inside planets like Earth and Neptune? New research from UCLA and Princeton ...

Researchers have made a new discovery that changes our understanding of Earth's early geological history, challenging beliefs ...

Our planet's closest and brightest neighbor will pass approximately between the Earth and sun this week, in what's called an ...

Barnard’s Star is notorious among astronomers for a history of false planet detections but it appears the latest discovery – ...

A devastating meteorite strike over three billion years ago may have been just what early life needed to thrive. While it’s ...