Staring at the Sun

On 29 April, 2015, three satellite observatories—NuSTAR, Hinode, and Solar Dynamics Observatory—all stared at our Sun. This image merges data from  Nuclear Spectroscopic Telescope Array, or NuSTAR (high-energy x-rays shown in blue), Japan’s Hinode spacecraft (low-energy x-rays in green), and SDO (extreme UV in yellow and red). The blue-white NuSTAR data pinpoint the most energetic areas.

Image Credit: NASA  /JPL-Caltech / GSFC / JAXA

Another Flare

quad-flareDuring a December, 2013, solar flare, three satellites watched a current sheet form. This animation shows four views of the flare from the Solar Dynamics Observatory, the Solar and Terrestrial Relations Observatory, and JAXA’s Hinode. The current sheet is a long, thin structure, especially visible in the views on the left. Those two animations depict light emitted by material with higher temperatures, so they better show the extremely hot current sheet.

A current sheet is a very fast, very flat flow of electrically-charged material, extremely thin compared to its length and width. Current sheets form when two oppositely-aligned magnetic fields come in close contact, creating very high magnetic force.

Image Credits: NASA / JAXA