The Event Horizon Telescope, EHT (EHT), is an interferometer with radio telescopes globally. With these telescopes, the EHT has created a virtual telescope using something called baseline interferometry, which is the size of our Earth. It is funded by the U.S. National Science Foundation, an “independent federal agency” that promotes studies of science and works to research subjects, especially black holes, at an enormous size. The EHT uses a collection of radio telescopes around the world to study the physics of black holes and their surfaces where even light can not escape, called its event horizon.
Astronomers at the EHT have located radio waves from 230 GHz, 1.3 millimeters in wavelength, which has led to the first visual evidence of black holes, specifically Srg A*. Recently, these waves have been found at 345 GHz, a 0.87-millimeter wavelength, producing higher quality images with sharper details of the gas around black holes that contain light, molded by gravity, that locate the black holes in our galaxy. Despite the fact black holes are not visible because they are dark.
For improved images of black holes, astronomers must look at a higher frequency, which they have started doing, and additionally, create bigger radio telescopes, which is done due to the earth-sized telescope. At this distance, no images have been produced. However, after this experiment, the EHT thinks future visual representation will be “50% more detailed than before,” as the Center For Astrophysics at Harvard states. For the future, I am excited to see what images are produced with this advanced technology because although black holes are not visible, seeing the range of lit gas around them can advance their study.
In Orbit 