First Light at the Dark Energy Spectroscopic Instrument

Posted in The Universe and Stuff with tags , , , , , , on November 4, 2019 by telescoper

While I was away last week there was quite a lot of press coverage (e.g. here) about the new Dark Energy Spectroscopic Instrument, which has just seen first light. I didn’t have time to mention this until now, and in any case  I have little to add to the coverage that has already appeared, but it does give me the excuse to post this nice video – which features quite a few people I actually know! – to describe  the huge galaxy survey that DESI will perform. It’s hard to believe that when I started in the field in 1985 the largest such survey, which took several years to compile, had only a few thousand galaxies in it. The DESI instrument will be able to determine spectra of more sources than that in a single pointing of the telescope that lasts about 20 minutes. Overall it should determine redshifts of over 35 million galaxies! Vorsprung durch Technik.

 

 

Sometimes I Feel Like A Motherless Child – Archie Shepp & Horace Parlan

Posted in Jazz with tags , on November 3, 2019 by telescoper

 

 

In Memoriam

Posted in Biographical on November 2, 2019 by telescoper

This is going to be a very short post, but also a very difficult one to write. My Mam has passed away, having lost her struggle against Alzheimer’s Disease. Mercifully at least the end was peaceful and she’s now at rest. Ar dheis Dé go raibh a hanam.

This is a picture of us in happier times taken just outside the Brighton Centre just after I received my doctorate from Sussex University in 1989.

Can that really have been 30 years ago?

The first I knew about her final illness was at the end of 2015 when I visited for Christmas and noticed how much her memory and behavior had changed. Shortly after that came the official diagnosis. Her condition deteriorated rapidly thereafter as dementia cruelly took hold and about eighteen months ago, being virtually completely incapacitated, she had to move into a care home. Fortunately she seemed relatively happy there. In the end it was pneumonia that took her, but at least she slipped away gently.

During the years of her illness I have never written about it here because I couldn’t find the words. Now I have to admit that when I heard the news that Mam had died my first reaction was a sort of relief that her torments were over. That was quickly overtaken by a sense of guilt (a) that I had felt like that and (b) that I hadn’t been there enough or done enough to help. Now I just feel numb, unable really to take it in. I keep hoping for some sort of catharsis, but it doesn’t happen.

My Mam’s illness was one of the causes of stress that led to my decision to step down from my role as Head of the School of Mathematical and Physical Sciences at Sussex University back in 2016. I had a notion that moving to a part-time job I might be able to help look after Mam, but I found the whole situation too painful and other things got in the way. I wasn’t strong enough to contribute anything significant and the burden fell on the shoulders of others. Now I’ll never be able to put that right.

I have to reorganize quite a few things next week so I can attend the funeral in Newcastle, so I’ll occupy myself doing that.

The Cosmic Web at DIAS

Posted in Books, Talks and Reviews, The Universe and Stuff with tags , , on November 1, 2019 by telescoper

Yesterday evening found me at the Dublin Institute for Advanced Studies, complete with scary Hallowe’en beard, to give a talk.

Picture Credit: Prof. Luke Drury

It was a nice friendly audience and we had a lot of interesting discussions afterwards. As usual on such occasions I’ve put up the slides in case anyone wants to see them:

After the talk I headed back to Maynooth. It was a very rainy night, but at least some of the fireworks were going off despite the potential for damp squibs.

Halloween in the Dark Again

Posted in Biographical, Talks and Reviews with tags , on October 31, 2019 by telescoper

Although it’s still Study Week here in Maynooth I am back at work for the morning and then I’m attending a conferring ceremony this afternoon and later on I have to go into Dublin to give a talk at the Institute of Advanced Study. It’s Hallowe’en, of course, so no doubt there are quite a few weirdly dressed scary-looking people about, but one gets used to that working in a Physics Department. I just hope this evening’s talk isn’t an unintentionally horrible experience.

Anyway, it’s more than a decade since I posted my first blog about the real horror of Hallowe’en so, despite popular demand, I’ll take the excuse of a busy day to repeat it here.

–o–

We never had Hallowe’en when I was a kid. I mean it existed. People mentioned it. There were programmes on the telly. But we never celebrated it. At least not in my house, when I was a kid. It just wasn’t thought of as a big occasion. Or, worse, it was “American” (meaning that it was tacky, synthetic and commercialised). So there were no parties, no costumes, no horror masks, no pumpkins and definitely no trick-or-treat.

Having never done trick-or-treat myself I never acquired any knowledge of what it was about. I assumed “Trick or Treat?” was a rhetorical question or merely a greeting like “How do you do?”. My first direct experience of it didn’t happen until I was in my mid-thirties and had moved to a suburban house in Beeston, just outside Nottingham. I was sitting at home one October 31st, watching the TV and – probably, though I can’t remember for sure – drinking a glass of wine, when the front door bell rang. I didn’t really want to, but I got up and answered it.

When I opened the door, I saw in front of me two small girls in witches’ costumes. Behind them, near my front gate, was an adult guardian, presumably a parent, keeping a watchful eye on them.

“Trick or Treat?” the two girls shouted.

Trying my best to get into the spirit but not knowing what I was actually supposed to do, I answered “Great! I’d like a treat please”.

They stared at me as if I was mad, turned round and retreated towards their minder who was clearly making a mental note to avoid this house in future. Off they went and I, embarrassed at being exposed yet again as a social inadequate, retired to my house in shame.

Ever since then I’ve tried to ensure that I never again have to endure such Halloween horrors. Every October 31st, when night falls, I switch off the TV, radio and lights and sit soundlessly in the dark so the trick-or-treaters think there’s nobody at home.

That way I can be sure I won’t be made to feel uncomfortable.

The Royal Society really needs to work on its history of the telescope

Posted in History, The Universe and Stuff with tags , , , on October 30, 2019 by telescoper

An important corrective to frequently repeated fallacies about the history of telescopes in astronomy. The Royal Society really shouldn’t be making mistakes like this!

thonyc's avatarThe Renaissance Mathematicus

One would think that the Royal Society being one of the eldest, but not the eldest as they like to claim, scientific societies in Europe when presenting themselves as purveyors of the history of science, would take the trouble to get their facts right. If, however, one thought this, one would be wrong. Last week on the Internet the Royal Society was pushing a slide show, under their own name, on Google Arts and Culture on the history of the telescope in astronomy that in terms of historical accuracy is less than one, as a historian of science, nay of the telescope, might hope or indeed wish for.

The slide show in question is titled, Silent Harmony: astronomy at the Royal Society: Discover how innovation in telescopes and other optical instruments changed the way we see the universe. Following the title slide we have another general blurb slide…

View original post 835 more words

Meanwhile, in the House of Commons..

Posted in Politics with tags , on October 29, 2019 by telescoper

Hallowe’en at Dias!

Posted in Uncategorized with tags , , on October 29, 2019 by telescoper

I’m interrupting my short break to post a quick reminder that I’m giving a public talk at the Dublin Institute for Advanced Studies (DIAS) this coming Thursday, Dark Matter Day, October 31st 2019, coincidentally the same day as Hallowe’en, or in modern parlance Not-Brexit Day. I am particularly grateful to be invited to give a talk that evening because it allows me to avoid getting involved in trick-or-treat or any of that nonsense.

Here is the nice advert the people at DIAS have made for the event:

The talk is free, but you need to sign up here as the venue is not infinitely large and is already almost full. You can also find some more details about the talk there.

5/12 Term Break

Posted in Biographical, Maynooth on October 25, 2019 by telescoper

Today marks the end of the fifth week of teaching at Maynooth University and next week is the October mid-term break, starting with a bank holiday on Monday 28th October: the last Monday of October (Lá Saoire i mí Dheireadh Fómhair), or the Halloween Holiday (Lá Saoire Oíche Shamhna), is a national holiday in Ireland.

The mid-term break, optimistically known as ‘Study Week’, is often called ‘Half Term’ but since we have twelve-week teaching terms and we’ve only done five weeks at this point, I’ve used the more accurate description in the title of this post.

I’ll be back in Maynooth next week but I’m taking a few days off until then. Normal service will be resumed as soon as possible, but there will now follow a short intermission.

The Gaia video!

Posted in The Universe and Stuff with tags , on October 24, 2019 by telescoper

I’ve blogged quite a few times about the European Space Agency’s Gaia mission (see this tag). Social media brought this nice new video to my attention this morning so I couldn’t resist adding it to the collection. I don’t think it accompanies any new data release or scientific results but it’s very impressive anyway!