Black Holes and Galaxies: Professor Reinhard Genzel at ANU, July 2009

Evidence has been accumulating for several decades that many galaxies harbor central mass concentrations that may be in the form of black holes with masses between a few million to a few billion time the mass of the Sun.

In this public lecture, Professor Genzel discusses measurements over the last two decades, employing high resolution infrared and radio imaging and spectroscopy on large ground-based telescopes that prove the existence of such a massive black hole in the centre of our Milky Way, beyond any reasonable doubt. These data also provide key insights into its properties and environment.

Future interferometric studies of the Galactic Center black hole promise to be able to test gravity in its strong field limit. Professor Genzel also briefly summarizes the cosmological evolution of massive black holes.

This event is brought to you by the Australian Institute of Physics and the Black Hole Society, and took place on Monday 27 July 2009.

Category:

Education

Tags:

• physics
• science
• black holes
• galaxies
• astronomy
• infrared
• spectroscopy
• milky way
• galactic
• gravity
• ANU
• The anu
• canberra
• education

[TruneZeta]

@Zurround100 What a horribly, irrelevant response.

[alianantfarm]

dissapointingly low number of views

[rykana]

I don't feel my left ear

[tristbjorn]

@SkunkHunt Black hole are a them selves not observed. They were a theoretical by product of the laws of gravity. But if you bothered listening, then he actually told you where the evidence were found. Quasars can so far only be explained by the existence of black holes.

[anakmudajaman]

after i watched this video Evidence has been accumulating for several decades that many galaxies harbor central mass concentrations, my insight is very open because the video is very good to give information

[bundawartini]

Your Video Evidence has been accumulating for several decades that many galaxies harbor central mass concentrations that may be in the form of black holes with masses between a few million to a few billion time the mass of the Sun. Is Very Useful Sharing

[studas2011]

Both top comments have basic errors. Surprising, given the nature of the vid.

[unfinished8kt]

what an adorable professor. sadly, i'm going to a community college so i don't get to learn about black holes there :(

[brownj2]

@Pepsifx357 x-rays are a very energetic version of the same sort of radiation that makes up light. Astronomers use things like the Chandra space telescope to to just pick them up. Like photographing the light from a star, only the photons are moving with much higher energy. They move at the same speed as visible light , but they are just more energetic, these energetic photons vibrate faster, so they are higher frequency than visible light.

[oldi184]

Why Im receiving only one audio channel? Mono.

[2012DarkKnight]

Relatively speaking, the substance in a drain hole seems to have a mass area and rotation without motion of the hole.The Aether of space and dark matter fall into a hole of transformation, of a dimensional proportion. Our universe is a blastocyst of Gods body that transforms life and substance into energy and thought. As humans we are the seeds of life planted in Africa and grown through meiosis in the womb of our humanity, evolving through the effects of our causes transforming

E into MC2

[VanDammesCokeDealer]

@SkunkHunt Did you watch the whole video? He very clearly presented the evidence.