PBS Space Time Season 2019 Episode 18 How Black Holes Kill Galaxies

PBS Space Time's season 2019 episode 18, titled "How Black Holes Kill Galaxies," explores the relationship between black holes and the life cycle of galaxies. It delves into how black holes, although small in size compared to galaxies, can have a powerful influence on their surroundings.

Throughout the episode, viewers will be taken on a journey through the history of understanding black holes and their impact on galaxies. The hosts of the show will use stunning visual effects and interactive graphics to illustrate the complex scientific concepts involved.

The episode begins by introducing the idea of black holes as objects that consume everything in their path, even light. The hosts explain how scientists have been able to observe the effects of black holes by tracking the movements of stars that orbit around or near them.

As the episode progresses, viewers will learn how black holes can grow in size through the accretion of matter, and how they can become active when they have a nearby source of gas or other material to feed on. The hosts will also discuss how black holes can release enormous amounts of energy in the form of bright jets of particles and radiation.

One of the most interesting aspects of the episode is the discussion of how black holes can affect the growth and evolution of galaxies. They can do this by heating or expelling gas, which is necessary for new stars to form. Over time, this can lead to a galaxy becoming "dead" or devoid of active star formation.

The hosts will explore how black holes can "reheat" gas by colliding with it, and how this can lead to the creation of new stars. They will also discuss how black holes can be responsible for the formation of some of the brightest objects in the universe, including quasars.

Throughout the episode, the hosts will discuss the latest research and theories about black holes and their impact on galaxies. They will also explain how scientists use powerful telescopes and computer simulations to study these phenomena.

Overall, "How Black Holes Kill Galaxies" is a fascinating exploration of one of the most mysterious and powerful forces in the universe. Viewers will come away with a new appreciation for the ways in which black holes shape the cosmos, and the vital role they play in the lifecycle of galaxies.