An object inside our galaxy is moving so fast that it is on track to break free of the Milky Way altogether, racing through ...

A world preparing for one interstellar mystery is now confronting the legacy of another mission built for a different kind of threat. A silent shift in our planetary-defense strategy is underway.

With US astronauts scheduled to return to the Moon in 2026, it might be nice for them to really and truly know ahead of time what the gravity situation is going to be like. At 1/6th Earth’s gravity, ...

Far beyond Neptune, at the far outer rim of our Solar System, astronomers have spotted what looks like a hidden “structure” ...

Flat Earth theory, the erroneous idea that the Earth is flat, continues to persist online despite overwhelming evidence to the contrary. Some proponents of this model believe that the Earth cannot be ...

Potential impactors are most likely to have low velocities and the highest likelihood of hitting Earth during the winter.

Researchers have described a new, lower size limit for planets to maintain surface liquid water for long periods of time, extending the so-called Habitable or 'Goldilocks'' Zone for small, low-gravity ...

Interstellar objects moving through the Solar System represent a rare but scientifically valuable population of visitors that originate beyond the Sun’s gravitational reach. Their potential to collide ...

Even teeny objects obey the law of gravity. A gold ball just 2 millimeters wide, with a mass of about 90 milligrams, is now the smallest object to have its gravitational pull measured. Observations of ...

Mission engineers will track NASA's Lucy spacecraft nonstop as it prepares to swoop near Earth on Oct. 16 to use this planet's gravity to set itself on a course toward the Jupiter Trojan asteroids.