Its proximity to Earth and unique composition make it a valuable point of comparison to the ocean-hosting moons of the outer ...

Why does Jupiter look like it has a surface – even though it doesn’t have one? – Sejal, age 7, Bangalore, India ...

Recent research has identified that significant changes in the Earth's mantle composition began about 300 million years ago, ...

Once, the Earth was nothing but a world of mud. Indeed, about 650 million years ago, the planet shifted from a frozen state ...

Scientists have calculated the Earth to be 4.54 billion years old, with an uncertainty of 50 million years on either side.

Hale-Bopp originated in the Oort Cloud, a theoretical shell of icy planetesimals surrounding the sun in the outer reaches of ...

An asteroid named for the ancient Egyptian god of darkness and disorder may not pose a hazard to Earth, but that does not ...

researchers examine the isotope ratio on Earth and in meteorites. The isotopic composition of Earth's water is most similar to primitive meteorites. On the other hand, it's different from that of ...

Earth is constantly getting pummeled by meteorites ... Using a telescopic survey to determine the composition of the main families of asteroids in the main asteroid belt and tapping into computer ...

Why did life arise here and not there? What made Mars so different from Earth? The answer may lie in the crystals. Not only can the composition of a planet tell us how long it has been around ...