Black holes

7. a supermassive black hole feeding on gas at the center of a distant galaxy.
9. A photon sphere is a location where gravity is so strong that light can travel in circles. Photons orbit the black hole at the distance of the photon sphere.
10. the bending of light by the gravity of a massive object like a black hole, causing it to appear distorted from the gravitational effects.
12. A region of spacetime exhibiting such strong gravitational effects that nothing, not even particles and electromagnetic radiation, can escape from inside it
14. the core of a galaxy, where most of its stars, gas, and dust accumulate.
15. the distortion of space and time around a black hole, caused by strong gravitational fields.
16. The radius of a black hole, beyond which nothing, not even light, can escape from the gravitational pull.
17. The point at which the gravitational field of a massive object is so strong that even light cannot escape its pull.
18. a fast moving stream of charged particles, composed of magnetic fields and particles, emitted from a black hole.
19. a black hole that’s spinning round its axis of rotation, which resulting in the gravitational field in the region near it behaving differently from that of a non-spinning black hole.
20. a phrase that is used by astronomers to describe the mass of a star. It is usually enumerated in terms of the Sun's mass as a proportion of a solar mass

1. A phenomenon predicted by physicist Stephen Hawking, which suggests that some particles escape from a black hole.
2. stars with a supergiant luminosity class of spectral type K or M
3. thought to form by the gravitational collapse of the remnant of a massive star after a supernova explosion
4. concentric rings of dark matter, surrounding a supermassive black hole, which aid in its capture of dust and gas.
5. An infinitely dense point within a black hole with an infinite amount of gravity.
6. black hole is estimated to have a mass between 100 and 1000 solar masses.
8. a structure formed by diffuse material in orbital motion around a massive central body.
11. A type of black hole that has a mass between 100 million and 1 billion times that of the Sun.
13. an area in the spacetime curvature around a black hole, where matter and energy can travel in a straight line.