With an atmosphere, by mass, of primarily hydrogen (76 per cent) and helium (24 per cent), and by volume of 89 per cent ...

Scientists are intrigued after spotting a highly unusual celestial object lurking at the very edge of our solar system.

NASA’s Asteroid Watch Dashboard has issued a new list of five asteroids on approach, with close passes to Earth expected ...

In a thrilling development that challenges long-held assumptions about the outer reaches of our solar system, astronomers ...

A new dwarf planet, discovered beyond Neptune and described as Pluto's 'cousin,' could void the hypothesis of a Planet X in ...

Earth-like exoplanets might be more common throughout the Milky Way than previously believed, astronomers report in a new ...

An international team of astronomers claim to have discovered a 'super-Earth' that's bigger than our own blue planet but smaller than Neptune. A new paper, published in the journal, Science has ...

But all those planets were more massive than Earth. Thanks to larger telescopes ... the MAROON-X and ESPRESSO teams successfully detected much smaller planets. The four planets range from at ...

Why does our solar system lack the most common types of planets in the galaxy—those larger than Earth but smaller than Neptune? And perhaps most important, how do these findings affect our ...

The three other potential planets orbiting Barnard's star all apparently are rocky and smaller than Earth, ranging from 20-30% of Earth's mass. The hope is that at least one of these may be in the ...

The white dwarf is orbited by two bodies - the Earth-like planet and, further out, a brown dwarf, an object bigger than a planet but smaller than a star. The planet endured tough times during its ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Two teams of ...