He says existing models of the jets assume they require certain properties unique to black holes,
such as event horizons.
We used to think black hole gravity was so strong that nothing could escape past the point
known as the event horizon, and a black hole could never shrink in size.
The pulse temporarily increases the glass's index of refraction, creating a moving zone of high refractive index that
acts as an event horizon.
A black hole hides its singularity with a boundary known
as the event horizon.
An even stranger feature is an invisible spherical surface, known
as the event horizon, surrounding the singularity.
A black hole's outer boundary, known
as the event horizon, is a point of no return.
The EHT is so named because it will provide as close a look at a black hole as we can muster at this moment, carrying us virtually to the edge of the invisible boundary surrounding it — a spherical shell known
as the event horizon.
A black hole's gravity is so intense that beyond a certain boundary in its vicinity, known
as the event horizon, nothing can escape.