Eons ago, in the frigid depths of our solar system, a dramatic collision occurred between two icy worlds. Instead of a catastrophic smash-up, the two bodies “kissed,” merging temporarily like a ...

(CNN) – The moon may be 100 million years older than planetary scientists thought. The moon has long been thought to have formed roughly 4.35 billion years ago after a Mars-sized object collided with ...

Some of Earth's oldest rocks buried deep in Western Australia may hold new clues about the dramatic event that gave rise to ...

Roughly 4.3 billion years ago, a massive asteroid slammed into the far side of the moon, carving out the South Pole–Aitken ...

The moon's orbit isn't a perfect circle. Instead, it's more stretched out, kind of like an oval, which means its distance from Earth varies by about 30,000 miles (48,000 km). The surface of the moon ...

The study also compared the results with measurements of lunar anorthosites, which are rare rocks on Earth but very common on ...