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.

Earth has only one natural satellite, the moon, which is relatively large compared to its parent planet. It orbits Earth at an average distance of about 384,400 kilometers and completes one revolution approximately every ...

Recent scientific research has unearthed an intriguing proposition that Earth may have once been orbited by two moons instead of one. This radical idea not only challenges our understanding of the lunar formation narrative but also gives us a fresh ...

Astronomers recently detected a stray quasi-moon in our planet’s orbit, but it's hardly the first stowaway to hang out around Earth. Unlike the Earth's moon, quasi-moons are not gravitationally bound to our planet. Some may be asteroids, which orbit the ...

High-energy particles called galactic cosmic rays (GCRs) bombard unprotected objects in space, often causing damage. Earth, however, is protected by its magnetic field, which creates a protective shell around the planet that can deflect dangerous charged particles,

NASA's latest photos from the Artemis II mission show Earth in stunning details as the astronauts near a milestone distance of 100,000 miles away.

At this point, the Artemis II crew will be headed out toward the moon. Here's what the astronauts are doing during day three.

The four astronauts on the Artemis II mission have passed the halfway point between the Earth and the moon. Mark Strassmann spoke with the astronauts about the accomplishment.