对树木年轮物质的光谱分析表明，碳-14浓度在一年内急剧上升，这与发生在公元前5410年左右的极端太阳高能粒子事件相一致。
Energetic particles
Posted inResearch Spotlights
Tree Rings Show Record of Newly Identified Extreme Solar Activity Event
Mass spectroscopy of tree ring material indicates a sharp, single-year rise in carbon-14 concentrations consistent with an extreme solar energetic particle event that occurred around 5410 BCE.
Posted inNews
An Underwater Telescope to Study Sky and Sea
To peer into the farthest reaches of the universe, you must first build a giant underwater telescope.
Posted inResearch Spotlights
New Real-Time Model May Protect Astronauts from Space Radiation
Solar energetic particle events pose an acute risk to space travelers outside the protection of Earth’s magnetic field. A new initiative aims to quantify the danger.
Posted inResearch Spotlights
Increasing Radiation Levels May Challenge Space Exploration
New research shows that solar radiation levels are growing 10% faster than previously believed and that the radiation environment in space will worsen with time.
Posted inEditors' Vox
Global Positioning System Sparks New Data Revolution
Energetic particle data from the Global Positioning System constellation opens avenues for new research.