It takes an Earth-sized telescope to observe the black hole’s outline; learn how registration was made | The subject

The world saw on Thursday (12) the first record of Sagittarius A*, the supermassive black hole at the center of the Milky Way. It is a cosmic abyss that sucks in everything that approaches it, even light.

The image was taken by the Event Horizon Telescope, a project made up of 11 radio observatories distributed in 8 different locations around the world.

The Milky Way and the location of its central black hole as seen by the ALMA telescope. — Photo: ESO/José Francisco Salgado (josefrancisco.org), EHT Collaboration

Without this international collaboration, an Earth-sized telescope would be needed to observe the outline of Sagittarius A*. This is what astrophysicist Thaisa Storchi Bergmann, from the Federal University of Rio Grande do Sul, explains. The scientist became internationally known when she published a study providing evidence of a supermassive black hole.

  • Know more: what are black holes?

“In space, when you want to observe a small target, the smaller the target, the bigger the antenna or telescope has to be. To observe an orange on the moon – which is the equivalent angular diameter of the black hole’s event horizon – you need a antenna the size of the Earth”, he says.

Thais also explains why the record made by the 11 observatories represents a scientific advance to be celebrated beyond the possibility of observing the black hole.

“This technique is very sophisticated. It involves a lot of computational challenges and all these observatories have to observe the same target at the same time and then combine all the signals. This is a major technological challenge that has only been accomplished today.”

Listen to the full interview in episode #705 of The Subject.

  • Bolsonaro targets the TSE for ‘permanent coup’ that weakens confidence in the elections, evaluates Carlos Andreazza
  • Hepatitis outbreak in children is not related to Covid vaccination

About Raju Singh

Raju has an exquisite taste. For him, video games are more than entertainment and he likes to discuss forms and art.

Check Also

Samsung presents Galaxy M23 and M53 5G in Brazil with 120 Hz screen and up to 108 MP camera

On the morning of this Tuesday (17), Samsung made official in Brazil two more models …