cosmic rays

An enormous solar filament, hundreds of thousands of kilometers across, erupted from the Sun in August 2012. Credit: NASA/GSFC/SDO

Want to go to Mars? Better leave when the Sun is active to minimize galactic radiation poisoning

By Phil Plait 1 month ago

NASA image of a supernova remnant

Supernova shockwaves have just been spawned in a lab right here on Earth

By Elizabeth Rayne 1 year ago

The Moon glows in gamma rays, created as cosmic rays slam into its surface. This series of images displays longer and longer exposures by the Fermi space telescope, showing how the images gets better with time. Credit: NASA/DOE/Fermi LAT Collaboration

The Moon is brighter than the Sun … in gamma rays

By Phil Plait 2 years ago

The galaxy NGC 3079 shows stars seen by Hubble (orange and blue) as well as X-rays (purple) by the Chandra X-ray Observatory. Credit: X-ray: NASA/CXC/University of Michigan/J-T Li et al.; Optical: NASA/STScI

A galaxy is blowing enormous megacharged superbubbles of gas and cosmic rays

By Phil Plait 2 years ago