The Earth image has been overlaid to scale. Images of meteor-like fireballs have been spotted in images of the sun’s corona—it’s mysteriously hotter outer atmosphere. They were sent back by ...

The sun's upper atmosphere, or solar corona, consists of extremely hot plasma ... Filaments and active regions sometimes produce coronal mass ejections (CMEs), hurtling huge tangled clouds of plasma ...

CCOR-1 began its mission to observe the sun's corona — the faint outermost layer of the solar atmosphere — on Sept. 19. The powerful solar telescope uses an occulting disk, visible as a dark ...