Researchers are keeping an eye on the building-sized asteroid 2024 YR4, which has a 4 percent chance of hitting the moon seven years from now. More

A massive collision between two asteroid-sized bodies around a nearby star offers a rare look at the violent process of planetary construction. More

The Terra Hunting Experiment will track the wobbles of dozens of stars nightly for years in the most focused hunt yet for an Earth twin. More

A mysterious excess of far-ultraviolet light seen across the Milky Way could come from the annihilation of clumpy dark matter. More

The tiny pantheon known as the Asgard archaea bear traits that hint at how plants, animals and fungi emerged on Earth. More