Chemical rockets have powered humanity’s journey into space for decades. Their explosive thrust is essential for launch, but in the vacuum of space, these systems quickly burn through fuel, making ...

Asteroid 2024 YR4 has a 0.0017% chance of hitting Earth, but media reports too often ignore the unlikelihood of impact in reports of near-Earth asteroids, a Tucson astronomer says.

While Asteroid 2024 YRA has a minute chance of hitting Earth in seven years, the co-lead of NASA's DART mission says a small spacecraft could deflect the space rock's course.