The Cosmic Web – my Lincoln lecture slides…
For those of you who are interested, here are the slides I used for the 1st Annual Robert Grosseteste Lecture on Astrophysics/Cosmology, given at the University of Lincoln on Thursday 23rd February 2017.
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February 28, 2017 at 1:59 pm
I just had two academics, who could not make it or only made only to a half, asking for the slides!!!! Thanks!!!
February 28, 2017 at 3:04 pm
Was it recorded?
February 28, 2017 at 3:19 pm
I don’t know. Someone was taking photographs, but I am not sure it was recorded in full.
February 28, 2017 at 9:44 pm
[…] Poseidon has definitely sent storm Doris to prevent establishing a new tradition in Lincoln – annual public lectures in Cosmology/Astrophysics. However, his efforts were in vain: in a truly heroic 9 hours trip, combining multiple trains and a taxi, our inaugural speaker Professor Peter Coles arrived from Cardiff to the waiting audience in Lincoln. Straight out of the car he delivered a most fascinating 1st Annual Robert Grosseteste Lecture in Astrophysics/Cosmology. The lecture series is named after a medieval bishop of Lincoln, Robert Grosseteste. Peter took us on a time journey of the formation of the Universe and the history of our knowledge about it from the medieval times to the modern research on the large web structures. His talk sparkled some questions, and you can see his slides in this link. […]
February 28, 2017 at 9:46 pm
Unfortunately, it was not recorded, but some photos can be seen here: http://wp.me/p50o6C-Ae
March 7, 2017 at 6:28 pm
FWIW: Robert Grosseteste was priest at St. Margarets church in Leicester before going to Lincoln. You can still see some items relating to Grosseteste at St. Margarets. His name is engraved in the arch of one of the doors.
March 7, 2017 at 11:06 pm
Thank you, Klaas. Wonderfull! I shall try to visit and see it!
March 9, 2017 at 9:08 am
In the “visible” universe, all galaxies must be travelling at less than the speed of light. Therefore, all galaxies outside the visible universe must be travelling faster than the speed of light. Within the boundaries of the “visible” universe, could there be galaxies traveling faster than the speed of light and hence we can’t see them?
March 9, 2017 at 11:03 am
If we can’t see them they’re not visible.
March 9, 2017 at 12:17 pm
We can certainly see galaxies now which are travelling at faster than the speed of light now.
It is not the case that galaxies outside the visible universe must be travelling at faster than the speed of light. It is true now, in our universe, but is not true in general.
Basically, we see a galaxy after light from us has had time to reach us. (This defines the “particle horizon”.) What the speed of that galaxy when the light was emitted, or now, is a separate question.
As always, I recommend Cosmology: The Science of the Universe, which is a textbook by the late, great Edward Harrison. If you read just one book on cosmology, this should be it.
March 10, 2017 at 4:33 pm
Thanks Phillip