Mercury has long baffled astronomers because it defies much of what we know about planet formation. A new space mission ...

Scientists have discovered that Earth’s inner core may not be fully solid. A rare “superionic” state of matter could explain ...

The Earth's magnetic field and oxygen evolved together over 540 million years, according to a major NASA study.

We only have to look up at the Moon to see the remains of a cataclysmic collision between two early planets, billions of years ago. Now scientists suggest evidence may also be deep beneath our feet, ...

NASA researchers recently discovered the largest solid core ever found in an extrasolar planet, and their discovery confirms a planet formation theory. “For theorists, the discovery of a planet with ...

Small magnetic waves have been discovered at Earth's core, with each oscillation working on a seven year cycle. Earth's magnetic field is generated by electric currents generated by the movement of ...

Since 2018, NASA's Transiting Exoplanet Survey Satellite (TESS) has scoured the skies to search for strange alien worlds spread out in different parts of the universe. But, until now, it's never seen ...

Astronomers have discovered an extrasolar planet with the largest core of any known planet. The discovery is especially exciting to planet formation theorists, because it provides extremely strong ...

Mars has had its first CT scan, thanks to analyses of seismic waves picked up by NASA’s InSight lander. Diagnosis: The Red Planet’s core is at least partially liquid, as some previous studies had ...

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

Convulsions in the planet’s interior are picked up in the region known as the C ring, and help scientists understand what lies within. By Robin George Andrews Saturn’s icy rings are not just ...

An international team of researchers has discovered an extremely unusual, dense object, around 730 light-years from Earth, which they say is the exposed remnant core of a gas giant planet. The object ...