Scientists discovered that methyl halides, a gas produced by microbes, could be a biosignature for life on distant planets.

Strange aliens could be hiding in gases, scientists say - Gases could be found relatively easily and quickly with existing ...

New research published in The Astronomical Journal suggests another explanation for these strange worlds, and they might mirror a planet in our own system. Don't Miss: Today’s deals: $399 iPad ...

Astronomers have detected mysterious X-ray signals coming from a nearby white dwarf star for more than 40 years. We may now ...

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 ...

Scientists may have uncovered the origins of starless planets, or planetary-mass objects (PMOs). Simulations reveal they form ...