Radiation environment
Solar Energetic Particles (SEP)
Bursts of high-energy particles accelerated by solar flares and coronal mass ejections. Unlike the steady galactic cosmic rays, SEP events are sudden and can deliver a dangerous radiation dose to astronauts within hours.
Environment & effects
Part of:Cosmic Rays
Monitored by:ACE (Advanced Composition Explorer)
Knowledge connections
- Part ofCosmic Rays
- AffectsEarth
- AffectsThe Moon
- Observed byACE (Advanced Composition Explorer)
- Associated withSolar Flare
- Associated withNOAA S-Scale (Solar Radiation Storms)
- Associated withNOAA S-Scale (Solar Radiation Storms)
- Associated withRadiation Shielding
- Associated withSpace radiation exposure
- Associated withSatellites
- Associated withAviation
- Associated withHuman Spaceflight
Sources
The primary and reference sources this topic draws on.
- NASANational Aeronautics and Space Administration
Mission data, planetary science, space telescopes, and public-domain imagery.
Most NASA-produced imagery is in the public domain; individual items are checked for usage terms before publication.
- NOAA Solar CalculatorNOAA Global Monitoring Laboratory
Public-domain solar-position geometry: sunrise, sunset, solar noon, twilight, declination, and the equation of time.
Public domain (US Government work).