NASA's 3D sun images are more than just eye candy. Being able to see the far side of the sun offers early warning of solar flares that can toast satellites and disrupt radio commuications.

STEREO snapped a 3D image of the full disc of the Sun, which shows three holes in its outer atmosphere, or corona. The holes appear dark in part because they contain fewer particles that emit light ...

NASA intends to take an unprecedented 3D observation of the sun this month. In doing so, the agency hopes to understand why its outer atmosphere — the corona — is hotter than its surface, how does the ...