Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to ...

Long ago, the Moon was much nearer Earth. Scientists believe a protoplanet collision created the Moon 4.5 billion years ago.

Researchers are discussing 2025 PN7, a small celestial body that's following a similar orbital path to our planet's without being gravitationally tied to Earth ...

The Earth stands alone in the solar system as a habitable world, as far as we know. But that doesn’t mean we don’t get visitors, most often in the form of (usually harmless) asteroids. Some even ...

Earth's orbit just got a bit more crowded. A second moon joined the Earth's orbit on Sunday, September 29 th. The ‘mini moon’ is actually a small asteroid, the size of a school bus, that is known as ...

Earth asteroid lurked undetected for decades until a telescope in Hawaii spotted it earlier this year. It may be Earth's ...

For the next two months, an unusual object about the size of a bus will be orbiting above our heads. Say hello to Earth’s temporary new "mini-moon." From Sept. 29 to Nov. 25, a passing asteroid will ...

The asteroid known as 2024 YR4 is out of sight yet still very much on scientists’ minds. The building-sized object, which initially appeared to be on a potential collision course with Earth, is ...