Galactic cosmic rays (GCRs) are mostly absorbed by Earth's atmosphere before they can reach the surface. However, they pose a significant radiation hazard to astronauts and high-altitude pilots, which is accepted as part of the job and taken into account when designing missions and the technology that supports them.

The world has tracked the journey of NASA’s Artemis II mission for five days. The four astronauts have launched into space, tested life support and other important systems of their Orion spacecraft, tangled with the vehicle’s toilet,

Dust brought back to Earth by China's Chang'e-6 mission contains rare meteorite relics that could change our understanding of sources of water and other life-essential ingredients in our solar system. Subscribe to our newsletter for the latest sci-tech ...

A team of scientists at the Southwest Research Institute, using photography commissioned from NASA's James Webb Space Telescope, have discovered a previously unknown moon in our solar system that's in a "nearly circular" orbit around Uranus. Just six miles ...

Jupiter’s moon Io is the most volcanically active place in the solar system. Let me tell you just how volcanic it is.