Both the speed of stars moving through space and their mass contribute to the size and shapes of bow shocks. (sciencedaily.com)
Called bow shocks, these dramatic arc - shaped features in space are helping researchers to uncover massive, so - called runaway stars. (sciencedaily.com)
The fliers in this nebula, which appear as two red blobs against a pale green background of radiation, seem to be moving fast enough — about 100,000 miles per hour — to fit Balick's original theory, but they also have backward - pointing bow shocks, as though an even faster wind were coming from behind and pushing past them. (discovermagazine.com)