If the object really is Planet Nine, it would be larger than Neptune and exist 700 times further from the sun than Earth.

For over a century, astronomers have wondered if there's an extra planet in our Solar System that we haven't been able to see ...

The dark nebula is part of the Circinus West molecular cloud, which stretches for 180 light-years, containing a mass 250,000 ...

They reveal a whole new level of detail in these planet-forming systems. Breakthroughs, discoveries, and DIY tips sent every ...

Astronomers using the James Webb Space Telescope have directly detected the faint glow of a planet that’s colder than any ...

The solar system consists of our star, the sun, and everything bound to it by gravity: the planets Mercury, Venus, Earth, ...

Earth" planet was discovered by researchers. It is not believed these planets are more common than previously thought.

Webb Telescope Captures Its First Direct Images of Carbon Dioxide Outside Solar System ... Neptunes -- planets that are 1 to 4 times the size of Earth and among the most common in our galaxy.

An international team including astronomers from the Center for Astrophysics | Harvard & Smithsonian (CfA) has announced the ...

A new study released on Thursday describes a search for what are called "microlensing" events, where a planet acts as a ...

Astronomers have spotted a small rocky planet that orbits perilously close to its host star disintegrating as its surface is ...