We've known for over 30 years that there are other stellar systems in our galaxy, but we don't have any idea how many there ...

More than 60 years after the first debunked discovery of a planet orbiting Barnard’s Star, the closest single-star system to ...

Last year, astronomers announced that a planet orbits Barnard’s star. Now, researchers have confirmed the existence of three more.

Pollard A quartet of Earth-like worlds, each about 20% to 30% the size of our planet, circle one of ... there was at least ...

Scientists already know that a planet must be in the “Goldilocks zone”—not too hot and not too cold—to have liquid water, a ...

The search for habitable planets has taken a leap forward with new space telescopes probing exoplanet atmospheres for life.

Venus, similar to the Moon, passes through distinct phases while orbiting the Sun. Around the days of the conjunction, the ...