Because the Earth is doing the work of increasing the Moon's momentum, the Earth's rotation slows down in turn, as its momentum goes to the Moon. To put it another way, as the Moon's orbital momentum ...

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 ...

The Moon is getting 1½ inches (3.8 centimeters) farther away from the Earth every year. Scientists measure the distance to the Moon by bouncing lasers off mirrors placed there by space probes and ...

Earth, sun, moon: three objects in space whose interactions have a pretty big impact on our lives. Earth orbits the sun once a year, and it rotates on its axis about once a day (depending on your ...

When Earth is opposite Mars from the sun, it will appear full because you’re looking directly on the daylit side. But ...

By incorporating modeling and lunar landing data, the tool could enhance visualization and training for entry, descent, ...

For the next two months, the moon will have a temporary companion in its orbit around the Earth. A small asteroid, called a “mini-moon,” will partially circle the Earth before returning on an ...

Ready or not, 2024 YR4 is coming to an orbit near you. Chilling animations depict the apocalyptic impact that “city-killer” asteroid YR4 2024 could have if it did hit Earth — while astronomers warn ...

Scientists have discovered a previously unknown quasi-moon that’s been shadowing Earth’s orbit for decades, undetected, and will likely remain there for a few decades more. The quasi-moon, named 2025 ...

The hum of simulators at NASA’s Johnson Space Center has grown louder in recent weeks, not just with machinery but with ...

If asteroid 2024 YR4 hits the Moon, it could launch dust and small rocks into space, creating micrometeoroid debris in low ...