A NASA-led study revealed that a near-Earth object long mistaken for an asteroid—1998 SH2—is actually a hidden comet—a ...

A seemingly ordinary asteroid has revealed its icy true identity — and new clues for spotting hidden hazards near Earth.

For China, planetary defense is about building its international image and strengthening national security. However, the same ...

Scientists from the China National Space Administration outlined a plan to directly change an asteroid’s trajectory relative ...

Asteroid 99942 Apophis is set to make an unusually close pass by Earth on April 13, 2029, but the important part is not ...

China is studying an on-orbit kinetic impact test mission for planetary defense that would target a small near-Earth asteroid ...

In late December, a telescope in Chile discovered a small asteroid given the designation 2024 YR4. About a month later, initial observations of the asteroid, estimated to be 40 to 90 meters across, ...

To help guide NASA’s efforts over the next decade, the agency today released its Planetary Defense Strategy and Action Plan. For three decades, NASA has engaged in studying near-Earth objects (NEOs), ...

Forbes contributors publish independent expert analyses and insights. I cover the history of science and exploration. On June 30, 1908, an asteroid about 65 meters wide collided with Earth’s ...

If a large asteroid is ever found to be on a direct collision course with Earth, we currently have one tried-and-tested technology that, if further developed, could save us from its potentially ...

This article was originally featured on Undark. On a fall evening in 2022, scientists at the Johns Hopkins University Applied Physics Laboratory were busy with the final stages of a planetary defense ...