The Sacramento Juneteenth Festival 2025 was a celebration of freedom and culture, honoring community champions and featuring soulful gospel and music.

When these particles—called cosmic rays—collide with our upper atmosphere, the impact produces a spray of particles that includes muons. Earth’s natural muon drizzle poses no threat.

A type of lichen was able to survive extreme UV radiation in the lab, suggesting that ozone protection might not be required for life on exoplanets.

A long time ago in a galaxy far, far away... Astronomers have observed a rare and spectacular phenomenon dating back over 11 billion years: a quasar, the hyperactive core of a distant galaxy, ...

The Threat of Cosmic Radiation Earth’s magnetic field acts as a shield, largely protecting us from high-energy radiation from the Sun and galactic cosmic rays. But in space, especially beyond Earth’s ...

Hydrogel is something that most of us are familiar with from it being used in contact lenses, burn dressings, and hair gel. In future, it might also be used to shield astronauts from the hazard of ...

Cosmic rays come in the form of both charged particles, like electrons, accelerated to very high velocities by encounters with astronomical phenomena, and high energy photons like gamma rays.

Xiaochun He and his students have developed a detector to measure cosmic rays and investigate how space weather can impact our changing climate. It’s just one of his research projects at the ...

In the United States, the average annual dose from cosmic radiation stands at 0.34 mSv (34 mrem) per year. This relatively low dose of radiation is improbable to have any adverse effects on human ...