Three scientists have been awarded the 2020 Nobel Prize in Physics for work to understand black holes.
Roger Penrose, Reinhard Genzel and Andrea Ghez were announced as this year's winners at a news conference in Stockholm.
The winners will share the prize money of 10 million kronor (£864,200).
Swedish industrialist and chemist Alfred Nobel founded the prizes in his will, written in 1895 - a year before his death.
David Haviland, chair of the physics prize committee, said this year's award "celebrates one of the most exotic objects in the Universe".
Black holes are regions of space where gravity is so strong that not even light can escape from them.
UK-born physicist Roger Penrose demonstrated that black holes were an inevitable consequence of Albert's Einstein's theory of general relativity.
According to Ulf Danielsson, a member of the Nobel Committee, Penrose "laid the theoretical foundations to say: these objects exist. You can expect to find them if you go out and look for them".