The search for an unknown planet in our solar system has inspired astronomers for more than a century. Now, a recent study suggests a potential new candidate, which the paper’s authors have dubbed ...

Our solar system is a smashing success. A new study suggests that from its earliest period—even before the last of its nebular gas had been consumed—Earth's solar system and its planets looked more ...

Astronomers have discovered a significant “growth spurt” in a rogue planet outside of our solar system. The free-floating planet is currently consuming gas and dust from its surroundings at a rate of ...

The NASA/ESA/CSA James Webb Space Telescope has provided the first direct measurements of the chemical and physical properties of a potential moon-forming disk encircling a large exoplanet. The carbon ...

Astronomers have observed a massive growth rate in a free-floating rogue planet that’s gobbling up gas and dust at a record rate of 6.6 billion tons per second.

The asteroid belt may seem permanent, but it is far from static. Its slow decline reveals a more violent past when more material collided with Earth and the Moon.

Mercury is tiny, barely bigger than the Moon. Its metallic core makes up 70% of the planet’s mass, vastly exceeding Earth’s 32% and Mars ’ 25%. It’s unlikely that the core actually formed like this.

The James Webb Space Telescope has, for the first time, measured the carbon-rich concoction that forms a moon-forming disk of gas and dust around a newly formed planetary body. It is hoped the ...

Webb Telescope spots a carbon-rich disk around a distant planet, CT Cha b, offering rare clues to how moons may form.

For decades, Uranus baffled scientists because it seemed to have no internal heat. Now, new computer modeling shows the planet actually emits more energy than it receives from the Sun. This subtle ...

The timing of Earth's early formation points to a planet that started out dry. So, life’s essential building blocks arrived later, but how?

Scientists got a never-before-seen look at an area around a large exoplanet 625 light-years away where moons could potentially form.