NASA's Solar Dynamics Observatory came across an oddity that the spacecraft has rarely observed before: a dark filament encircling an active region (Oct. 29-31, 2017). Solar filaments are clouds of charged particles that float above the sun, tethered to it by magnetic forces.
from NASA http://ift.tt/2yhGPrr
via IFTTT
Nenhum comentário:
Postar um comentário