Not exact matches
According to B. S. Sathyaprakash, a theoretical physicist at Cardiff University, UK, and a senior LIGO researcher, this pattern suggests that the orbits of the black
holes were
nearly circular, and that LIGO probably had a bird's - eye view of the circles, looking almost straight down on them rather than edge - on.
Notice that the shadow of the black
hole — a dark,
nearly circular shape in the middle of the images — is only clearly visible at high frequencies (230 GHz / 1.3 mm) at which EHT operates.
Although Lighthouse Reef is one of the smallest islands offshore of Belize, it is home to the Belize Blue
Hole, a
nearly perfectly
circular body of deep azure water that was rated by famed marine biologist Jacques Cousteau as one of the top 10 diving spots on the planet.
It left a
nearly perfect
circular hole about 300 m across and over hundred meter deep.