According to PhD candidate Krzysztof Rybicki, astronomers have so far been able to detect black holes by observing their effect on their surroundings.
He said: “We know them because they interact with their surrounding, whether that is the material that surrounds them, the accretion disk, or a companion from which material is being accreted.”
In other words, astronomers can only observe the light and radiation surrounding a black hole to determine its whereabouts.
Dr Wyrzykowski said: “Our method allows us to see the invisible.”
The astronomer added: “I think we will have our first black holes this year. I am an optimist.”