The lone planet confirmed to be in the system is squeezed in between the two, orbiting at a distance similar to Earth's distance from the Sun. And, as an added bonus, the planet is orbiting backward ...

One of the asteroids will come as close as within 120,000 miles from the Earth, soaring past at over 41,000 miles per hour.

The European Space Agency’s ACES mission could ultimately pave the way for a global network of atomic clocks that make these ...

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 [email protected]. Are planets in the solar system that are closer ...