Dr Steve Barrett, a Senior Research Fellow in the Department of Physics at the University of Liverpool, makes a welcome return, this time to describe the evolution of galaxies.

Although Steve’s research interests are centred around the applications of imaging and spectroscopy he has a passionate interest in astronomy which predates his professional career.

Steve will take us through the simple A-B-C of accretion, black holes and collisions… only it’s not that simple, of course.

To get the full picture, and to find out what is “coming our way” on the galactic scale, come along on Tuesday 5^th May.

UPDATE 6th May – some notes from Steve

Following his very well-received talk, Steve offers a copy of the slides he used. They can be downloaded here:
https://www.liv.ac.uk/~sdb/Talks/ABC-Galaxy-KnSciBar.pdf

and a video recording of the talk is here:
https://youtu.be/IP2VfhGyi8I

For those who asked about the idea of imaging a quasar receding from us at twice the speed of light, here’s a reminder of the ‘Ancient Light’ talk Steve gave via Zoom back in 2021:
Handout: https://www.liverpool.ac.uk/~sdb/Talks/Ancient-Light-KnSciBar.pdf
Recording: https://youtu.be/SX4s24SGQIE

If a galaxy is receding from us faster than the speed of light, how can the light ever reach us? A very good question. Steve hopes this Powerpoint presentation helps explain how:
https://www.liverpool.ac.uk/~sdb/Talks/Swimming-Against-Tide.pdf