Archive for the YouTube Category

Open Access and the Open Journal of Astrophysics

Posted in Open Access, YouTube with tags , , on September 18, 2021 by telescoper

Here is the video recording of the Invited Colloquium at the International School Daniel Chalonge – Hector de Vega I gave via Zoom on15th September 2021, introduced by Prof. Norma Sanchez.

In the talk I give a review about the absurdity of the current system of academic publishing, about what Open Access publishing means, and give a short introduction to the Open Journal of Astrophysics, an arXiv overlay journal.

I’m sorry if the recording is a bit choppy but that’s an occupational hazard with Zoom recordings and rather limited broadband!

The talk itself lasts about an hour, but was followed by an interesting discussion session so although the full video is rather long (2 1/2 hours) I’ve put it all there on Youtube.

You can download the video here. A PDF of the slides may be found here. You can also view the slides on slideshare:

The State of the Universe Video

Posted in Biographical, Talks and Reviews, The Universe and Stuff, YouTube on June 29, 2021 by telescoper

And now the moment you’ve all been waiting for. Here is a recording of the Invited Colloquium at the International School Daniel Chalonge – Hector de Vega I gave via Zoom on 23rd June 2021, introduced by Prof. Norma Sanchez.

In the talk I give a general review of the current state of cosmology, discussing the standard model of cosmology and some of the possible ways in which it might be revised or extended. It’s not a very technical talk but does assume some knowledge of cosmology. I hope a general audience will get something out of it.

I’m sorry if the recording is a bit choppy but that’s an occupational hazard with Zoom recordings and rather limited broadband!

This is an edited version of the session which in total lasted well over three hours including lengthy discussions and a trip down memory lane at the end. I cut out the introduction but kept a few of the questions and answers at the end, so it’s still rather long despite the rather brutal edits.

A video of the full event can be found here (1.6GB) and a PDF file of the slides can be found here. The slides are also available to be viewed here.

Watch “Why the Universe is quite disappointing really – Episode 7” on YouTube

Posted in The Universe and Stuff, YouTube with tags , , , , on September 3, 2020 by telescoper

Back for Episode 7 of this series in which I explain how we can measure the strength of acoustic waves in early Universe using measurements of the cosmic microwave background, and how that leads to the conclusion that the Big Bang wasn’t as loud as you probably thought. You can read more about this here.

Watch “The Eddington Eclipse Experiment of 1919” on YouTube

Posted in History, The Universe and Stuff, YouTube with tags , , , on August 6, 2020 by telescoper

I’d forgotten about this little video made after I appeared on the Pat Kenny show on NewsTalk radio last year. It was just me and the camera in a little room, but it turned out less like a hostage video than I’d feared..

Cosmology Talks: Eva-Maria Mueller on the last (e)BOSS Data Release

Posted in The Universe and Stuff, YouTube with tags , , , , on July 20, 2020 by telescoper

Today is another big day for cosmology as the last and final – why do people say that? – data release from the Extended Baryon Oscillation Spectroscopic Survey (eBOSS) is now available. That is the culmination of 20 years of effort with the Sloan Digital Sky Survey. Here is a pretty picture showing the enormous scales probed by the survey:

There is an overview paper on the cosmological implications of the survey on the arXiv here. Fortunately, the latest Cosmology Talk on the YouTube channel of Shaun Hotchkiss features a very interesting presentation by Eva-Maria Mueller who is the first author of that paper:

 

Watch “Why the Universe is quite disappointing really – Episode 6” on YouTube

Posted in The Universe and Stuff, YouTube with tags , , on June 30, 2020 by telescoper

I had to suspend the production of these videos for a month or so while I dealt with examination matters, but after that short hiatus, here is Episode 6 during which I explain just how weak and feeble the force of gravity really is. Combined with the fact that the Universe has such a low density (see Episode 5), the weakness of gravity means that the cosmos evolves extremely slowly.

Watch “Why the Universe is quite disappointing really – Episode 5” on YouTube

Posted in The Universe and Stuff, YouTube with tags , , , on May 21, 2020 by telescoper

Episode 5, in which I explain using a golf ball just how empty the Universe is. It is so empty, in fact, that even the crowded places are very empty. And as for the empty places, they’re practically nothing.

Watch “Why the Universe is quite disappointing, really – Episode 4” on YouTube

Posted in The Universe and Stuff, YouTube with tags , , , , on May 19, 2020 by telescoper

Episode 4, in which I show that spiral galaxies are very grubby – they contain huge amounts of dust. And not only galaxies – astronomical dust is everywhere we look. The Universe may be big, but it sure is dirty..

How to Solve Physics Problems

Posted in Cute Problems, Education, Maynooth, The Universe and Stuff, YouTube with tags , , on May 14, 2020 by telescoper

Since the examination period here at Maynooth University begins tomorrow I thought I would use the opportunity provided by my brand new YouTube channel to present a video version of a post I did a few years ago about how to solve Physics problems. These are intended for the type of problems students might encounter at high school or undergraduate level either in examinations or in homework. I’ve tried to keep the advice as general as possible though so hopefully students in other fields might find this useful too.

Watch “Why the Universe is quite disappointing, really – Episode 3” on YouTube

Posted in The Universe and Stuff, YouTube on May 12, 2020 by telescoper

Why the Universe is quite disappointing really – Episode 3, in which I give two examples of biological systems that are inefficient and poorly designed. If these are the product of intelligent design, the designer clearly wasn’t concentrating.