LEARNHow astronomers see
what can’t be seen
By Marcus WongThe scientists and astronomers of the Event Horizon
Telescope project showed how this is possible when
they captured the rst image of a black hole by using
an array of radio telescopes.
Unlike the telescopes
most of us are familiar
with, radio telescopes collect
radio frequency radiation
from extraterrestrial sourcesand send this data to
super computers known as
correlators to be analyzed.
In the case of the
Event Horizon Telescope(EHT), data from eight
telescopes across the world
was combined, with the
telescopes in locations
like volcanoes in Hawaiiand Mexico, mountains in
Arizona and the Spanish
Sierra Nevada, the Chilean
Atacama Desert, and
Antarctica.74 HWM | AUGUST 2019