Author Archive

The Eagle Nebula (as seen by Herschel)

Posted in Poetry, The Universe and Stuff with tags , , , on January 17, 2012 by telescoper

It’s been a while since I posted anything from the Herschel Space Observatory, but here’s a stunning image I just saw on the BBC website which will more than rectify that omission. This is the Eagle Nebula, a much-studied object in terms of the optical light it emits, but this is a remarkable picture taken in the far-infrared part of the spectrum.

For more details, see here.

There’s much more to astronomy than looking at pretty pictures, but the opportunity to stare at things like this is definitely one of the perks of the job. It makes me think of Tennyson’s Poem, The Eagle

He clasps the crag with crooked hands;
Close to the sun in lonely lands,
Ring’d with the azure world, he stands.

The wrinkled sea beneath him crawls;
He watches from his mountain walls,
And like a thunderbolt he falls.

Housman on Cricket

Posted in Cricket, Poetry with tags , , on January 17, 2012 by telescoper

I’m posting this cheery little poem in honour of England’s batting performance in the first innings against Pakistan this morning..

Twice a week the winter thorough
Here stood I to keep the goal:
Football then was fighting sorrow
For the young man’s soul.
Now in Maytime to the wicket
Out I march with bat and pad:
See the son of grief at cricket
Trying to be glad.
Try I will; no harm in trying:
Wonder ’tis how little mirth
Keeps the bones of man from lying
On the bed of earth.

Hungry Philosophers

Posted in The Universe and Stuff with tags , , on January 17, 2012 by telescoper

Examination Period

Posted in Biographical, Education with tags , , on January 16, 2012 by telescoper

Today is the start of our mid-year examination period which goes on for a fortnight at Cardiff University.It’s therefore a good opportunity to send a hearty “good luck” message to all students about to take examinations, especially those who are further on in their courses for whom these papers have greater importance.

I’m a bit too busy for anything particularly profound today, so I thought I’d just rehash an excerpt from something I posted a while ago on the subject of examinations.

My feelings about examinations agree pretty much with William Wordsworth, who studied at the same University as me, as expressed in this quotation from The Prelude:

Of College labours, of the Lecturer’s room
All studded round, as thick as chairs could stand,
With loyal students, faithful to their books,
Half-and-half idlers, hardy recusants,
And honest dunces–of important days,
Examinations, when the man was weighed
As in a balance! of excessive hopes,
Tremblings withal and commendable fears,
Small jealousies, and triumphs good or bad–
Let others that know more speak as they know.
Such glory was but little sought by me,
And little won.

It seems to me a great a pity that our system of education – both at School and University – places such a great emphasis on examination and assessment to the detriment of real learning. The biggest bane of physics education is the way modular degrees have been implemented.

Don’t get me wrong. I’m not opposed to modularisation in principle. I just think the way we teach modules in British universities fails to develop any understanding of the interconnection between different aspects of the subject. That’s an educational disaster because what is most exciting and compelling about physics is its essential unity. Splitting it into little boxes, taught on their own with no relationship to the other boxes, provides us with no scope to nurture the kind of lateral thinking that is key to the way physicists attempt to solve problems. The small size of each module makes the syllabus very “bitty” and fragmented. No sooner have you started to explore something at a proper level than the module is over. More advanced modules, following perhaps the following year, have to recap a large fraction of the earlier modules so there isn’t time to go as deep as one would like even over the whole curriculum.

Our students take 120 “credits” in a year, split into two semesters. These are usually split into 10-credit modules with an examination at the end of each semester. Laboratories, projects, and other continuously-assessed work do not involve a written examination, but the system means that a typical  student will have 5 written examination papers in January and another 5 in May. Each paper is usually of two hours’ duration.

This means that the ratio of assessment to education has risen sharply over the last decades with the undeniable result that academic standards have fallen in physics. The system encourages students to think of modules as little bit-sized bits of education to be consumed and then forgotten. Instead of learning to rely on their brains to solve problems, students tend to approach learning by memorising chunks of their notes and regurgitating them in the exam. I find it very sad when students ask me what derivations they should memorize to prepare for examinations. A brain is so much more than a memory device. What we should be doing is giving students the confidence to think for themselves and use their intellect to its full potential rather than encouraging rote learning.

You can contrast this diet of examinations with the regime when I was an undergraduate. My entire degree result was based on six three-hour written examinations taken at the end of my final year, rather than something like 30 examinations taken over 3 years. Moreover, my finals were all in a three-day period. Morning and afternoon exams for three consecutive days is an ordeal I wouldn’t wish on anyone so I’m not saying the old days were better, but I do think we’ve gone far too far to the opposite extreme. The one good thing about the system I went through was that there was no possibility of passing examinations on memory alone. Since they were so close together there was no way of mugging up anything in between them. I only got through  by figuring things out in the exam room.

I don’t want to denigrate the achievements of students who are successful under the current system.  What I’m saying is that I don’t think the education we provide does justice to their talents. That’s our fault, not theirs…

Weather Bird

Posted in Jazz with tags , , , on January 15, 2012 by telescoper

Time to try countering the melancholy mood that has settled on me over the last few days. I just heard this track on the radio and coincidentally it came up on a random play on my iPod on Friday too. Clearly someone up there is telling me to share it with you.

This gem, recorded in New York city in 1928, is a duet between Louis Armstrong (on trumpet) and Earl Hines (piano). Both were marvellous musicians in their own right but in combination they were dazzling. This piece  is obviously totally spontaneous and it’s almost miraculous how it holds together while the two men attempt mischievously to pull it in different directions. But hold together it certainly does; this piece takes “making it up as you go along” into another dimension altogether and the result is 2 minutes and 38 seconds of the most joyful music-making you can ever hope to hear..

Astronomy in Darkness

Posted in The Universe and Stuff with tags , , , , , , , , on January 14, 2012 by telescoper

Yesterday, being the second Friday of the month, was the day for the Ordinary Meeting of the Royal Astronomical Society (followed by dinner at the Athenaeum for members of the RAS Club). Living and working in Cardiff it’s difficult for me to get the specialist RAS Meetings earlier in the day, but if I get myself sufficiently organized I can usually get to Burlington House in time for the 4pm start of the Ordinary Meeting, which is open to the public.

The distressing news we learnt on Thursday about the events of Wednesday night cast a shadow over the proceedings. Given that I was going to dinner afterwards, for which a jacket and tie are obligatory, I went through my collection of (rarely worn) ties, and decided that a black one would be appropriate. When I arrived at Burlington House I was just in time to hear a warm tribute paid by a clearly upset Professor Roger Davies, President of the RAS and Oxford colleague of the late Steve Rawlings. There then followed a minute’s silence in his memory.

The principal reaction to this news amongst the astronomers present was one of disbelief and/or incomprehension. Some  friends and colleagues of Steve clearly knew much more about what had happened than has so far appeared in the press, but I don’t think it’s appropriate for me to make these public at this stage. We will know the facts soon enough. A colleague also pointed out to me that Steve had spent most of his recent working life as a central figure in the project to build the Square Kilometre Array, which will be the world’s largest radio telescope. He has died just a matter of days before the announcement will be made of where the SKA will actually be built. It’s sobering to think that one can spend so many years working on a project, only for something wholly unforeseen to prevent one seeing it through to completion.

Anyway, the meeting included an interesting talk by Tom Kitching of the University of Edinburgh who talked about recent results from the Canada-France-Hawaii Telescope Lensing Survey (CHFTLenS). The same project was the subject of a press release because the results were presented earlier in the week at the American Astronomical Society meeting in Austin, Texas. I haven’t got time to go into the technicalities of this study – which exploits the phenomenon of weak gravitational lensing to reconstruct the distribution of unseen (dark) matter in the Universe through its gravitational effect on light from background sources – but Tom Kitching actually contributed a guest post to this blog some time ago which will give you some background.

In the talk he presented one of the first dark matter maps obtained from this survey, in which the bright colours represent regions of high dark matter density

Getting maps like this is no easy process, so this is mightily impressive work, but what struck me is that it doesn’t look very filamentary. In other words, the dark matter appears to reside predominantly in isolated blobs with not much hint of the complicated network of filaments we call the Cosmic Web. That’s a very subjective judgement, of course, and it will be necessary to study the properties of maps like this in considerable detail in order to see whether they really match the predictions of cosmological theory.

After the meeting, and a glass of wine in Burlington House, I toddled off to the Athenaeum for an extremely nice dinner. It being the Parish meeting of the RAS Club, afterwards we went through a number of items of Club business, including the election of four new members.

Life  goes on, as does astronomy, even in darkness.

When Death Comes

Posted in Poetry with tags , , on January 13, 2012 by telescoper

When death comes
like the hungry bear in autumn;
when death comes and takes all the bright coins from his purse

to buy me, and snaps the purse shut;
when death comes
like the measle-pox:

when death comes
like an iceberg between the shoulder blades,

I want to step through the door full of curiosity, wondering
what is it going to be like, that cottage of darkness?

And therefore I look upon everything
as a brotherhood and a sisterhood,
and I look upon time as no more than an idea,
and I consider eternity as another possibility,

and I think of each life as a flower, as common
as a field daisy, and as singular,

and each name a comfortable music in the mouth,
tending, as all music does, toward silence,

and each body a lion of courage, and something
precious to the earth.

When it’s over, I want to say: all my life
I was a bride married to amazement.
I was the bridegroom, taking the world into my arms.

When it’s over, I don’t want to wonder
if I have made of my life something particular, and real.
I don’t want to find myself sighing and frightened,
or full of argument.

I don’t want to end up simply having visited this world.

by Mary Oliver (b. 1935)

Just a closer walk with thee

Posted in Music, Television, The Universe and Stuff with tags , , , on January 12, 2012 by telescoper

I saw this clip a few days ago, and had it in mind to post it at an appropriate time. Unfortunately when I got home today I learned some news that makes today seem all too appropriate. A distinguished and respected colleague, Prof. Steve Rawlings, of Oxford University was found dead last night. This is shocking and desperately sad news. I have no idea what happened but apparently the Oxfordshire police have arrested a 49-year old man on suspicion of murder. No doubt more information will emerge in due course.

The connection between this sombre piece of news and the clip I  intended to post should become obvious when I tell you that it depicts a funeral. Indeed the music featured, the hymn or spiritual Just a Closer Walk with Thee, was the main music chosen for the service when my father died,  just over four years ago. It’s a lovely old traditional tune that often  plays a central role in New Orleans style funerals, as shown here, and is a melody that, for me, has a deep associattion with loss and bereavement.

The clip is taken from the US TV series Treme. I haven’t seen Treme -if it has been shown on UK TV I missed it – but it’s set in New Orleans in the aftermath of the near destruction of the city by Hurricane Katrina in 2005. Not knowing anything about the TV series I only watched the clip because of the music, but I was mightily impressed by the way the scene was photographed and how careful the producers had been in getting the details just right, because a funeral in New Orleans is unlike any other.

The sashes, parasols, and exaggerated, swaying slow march seen in the film are in some sense almost comical, but  they are also at the same time solemn and immensely dignified. Defiant, even. I don’t think it’s just because I am a jazz fan that I find this video so moving. Perhaps it’s really because, faced with the awesome finality of death, every action we take in life is comical anyway, just as every word is ultimately banal. However, if a farce is what  it’s going to be, let’s just make sure it’s done the way we like it – especially at the end.

One of the commenters on Youtube put it thus:

it aint my time yet .but when it is thats the way i wanna go home

Amen to that. I don’t think Steve Rawlings was a jazz fan, but this is the best way I can think of to pay my respects.

Away to Swansea

Posted in The Universe and Stuff with tags , , , , on January 11, 2012 by telescoper

Just time for a quick post this evening, primarily to make a note of an enjoyable event that took place this afternoon. I long since gave up keeping a proper journal so the old blog will have to play that role.

Today a small group of cosmologists from the School of Physics & Astronomy at Cardiff University made the short trip to Swansea to meet with members of the Physics department there. The idea of the meeting was to explore the possibilites of future research collaboration. For historical reasons there is a pretty strong separation in Wales between research in Particle Physics and Astronomy/Astrophysics; Swansea does the former and Cardiff does the latter. However, cosmology is an area in which there are possible overlaps between some of the – primarily theoretical – research going on at Swansea into, e.g., Quantum Gravity and what we do in Cardiff, e.g. inflationary cosmology.

Anyway we decided to get together for an afternoon of talks by members of both departments to see if anything emerged as potential research topics. In fact, a couple of interesting ideas were discussed and although the main focus of research differs substantially in the two institutions we’re definitely going to get together again to follow up these ideas.

Although I’ve been in Cardiff since 2007, I’d never visited Swansea University before which, considering that it’s only an hour away by train, is admittedly a bit pathetic. In fact I think it’s quite weird the two departments don’t collaborate more in other areas too. I’m certainly very keen to see more joint activities than we have now, so hopefully this is a move in that direction.

Anyway, I’d like to thank Graham Shore at Swansea for hosting us this afternoon and I very much look forward to the planned return leg which will be held in Cardiff in a couple of months.

The Messenger

Posted in Poetry with tags , , on January 11, 2012 by telescoper

The thing, he said, would come in the night at three
From the old churchyard on the hill below;
But crouching by an oak fire’s wholesome glow,
I tried to tell myself it could not be.

Surely, I mused, it was pleasantry
Devised by one who did not truly know
The Elder Sign, bequeathed from long ago,
That sets the fumbling forms of darkness free.

He had not meant it – no – but still I lit
Another lamp as starry Leo climbed
Out of the Seekonk, and a steeple chimed
Three – and the firelight faded, bit by bit.

Then at the door that cautious rattling came –
And the mad truth devoured me like a flame!

by Howard Phillips Lovecraft (1890-1937).