A single plume of plasma, many times taller than the diameter of Earth, rose up from the Sun, twisted and spun around, while spewing streams of particles for two days — Aug. 17-19, 2015 — before breaking apart.
NASA/GSFC/Solar Dynamics Observatory
A LIGO optics technician inspects one of LIGO's core optics by illuminating its surface with light. It is critical to LIGO's operation that there is no contamination on any of its optical surfaces.
Matt Heintze/Caltech/MIT/LIGO Lab
When the Galileo spacecraft swooped by Jupiter's frozen moon Europa in Nov. 1997, views of its blistered surface strengthened suspicions that a briny ocean harboring life could lie beneath an icy crust.