When two black holes spiral around each another before coalescing into one (illustrated), they emit gravitational waves that can give the newly formed black hole a high-speed jolt.
LIGO, CALTECH, MIT, AURORE SIMONNET/SONOMA STATE
Cerenkov light, generated by high-speed particles traveling faster than light through a material, emits a blue glow. The light can be used to image a variety of cancers, new research shows.
BAAC3NES/MOMENT/GETTY IMAGES
This image, taken by NASA’s now-defunct Galileo spacecraft, shows dunelike lumps on Jupiter’s third-largest moon Io. The dark area (lower left) is a lava flow, and the bright streaks that radiate outward may be evidence of material strewn by jets of vapor that burst from ....
A volcanic eruption (blue) can be seen on Jupiter’s moon Io, the most volcanically active body in the solar system. This image was taken by NASA’s Galileo mission, which ended in 2003.