I learned from Often In Error that the paper of Riess et al, reporting on the research that was buzzed in the NASA press release, is out. It is here.
(I must use the term “cosmic jerk†in an everyday sentence one day…. probably not as a term of endearment….)
I don’t know whether you caught this already, but if not, do consider listening to the 2nd November edition of BBC Radio 4’s “In Our Timeâ€. It is about Poincaré, his work, and the famous conjecture. From their website’s page on the programme:
The great French mathematician Henri Poincaré declared: “The scientist does not study mathematics because it is useful; he studies it because he delights in it, and he delights in it because it is beautiful. If nature were not beautiful, it would not be worth knowing and life would not be worth living. And it is because simplicity, because grandeur, is beautiful that we preferably seek simple facts, sublime facts, and that we delight now to follow the majestic course of the stars.â€
Poincaré’s ground-breaking work in the 19th and early 20th century has indeed led us to the stars and the consideration of the shape of the universe itself. He is known as the father of topology – the study of the properties of shapes and how they can be deformed. His famous Conjecture in this field has been causing mathematicians sleepless nights ever since. He is also credited as the Father of Chaos Theory.So how did this great polymath change the way we understand the world and indeed the universe? Why did his conjecture remain unproved for almost a century? And has it finally been cracked?
It is a particulalry good programme this time. This is a programme that focuses mostly on philosophy, and is often accused of being only rather superficial when it comes to covering the more hardcore and up-to-date science, but not this time. The guests are […] Click to continue reading this post
Yikes! I woke up a short while ago and realized that it is the weekend before Thanksgiving. You know what that means? The Doo Dah Parade!
[image: housing drill team]
It is the antidote to the (sometimes nauseatingly wholesome) Rose Parade that takes place at New Year’s, or the Macy’s Thanksgiving Day Parade. Here is what I said in a blog post last year: […] Click to continue reading this post
Friday saw me involved in the shooting of two more segments for a television show. Seems that the ones from last time did not work out too badly, so the program makers wanted to do more. Hurrah!
[image from Friday shoot]
This session was also a lot of fun, and one of the segments (especially) could end up being a particularly good example of getting a good chunk of a whole science story – showing the actual processes involved in doing science – on TV, er, depending upon how it is edited, of course. This is one reason I do this sort of thing. At least as important (in my opinion) as talking, as I also sometimes do, to the press about the fancier things we do (perhaps involving the origin of mass, and whether the universe may or may not have extra dimensions, etc) is the process of getting involved with people in the media to help them bring the cornerstones of all of science to a general audience. No fancy stuff, just the basic but ever so important connection between the physical world around them and simple scientific reasoning. This achieves some very important things, which I bet will last longer in a person’s mind and everyday life than […] Click to continue reading this post
I love making pies. I perfected my current pie-making technique when I was a graduate student in Southampton. I was in a rented house with four other students, and the house had a splendid apple tree in the back garden. I could not bear to see them all go to waste when it was in full crop. So I made apple pies. Lots of them.
A crucial part of the process of making a good pie is the making of the pastry that will constitute the crust. Very important indeed, unless you are cheating and buying a ready-made crust, in which case you are not making a pie any more – the actual work has been done for you. (Ok, sure, go ahead – shout at me…)
Well, I don’t need to do one of my long cooking posts about this just yet, since the Lab Lemming is concerned about these issues too, I noticed, and has gone to the trouble of preparing what looks like a careful study of the process (including the pitfalls) just in time for the beginning of the primary pie-making season (Thanksgiving, etc…). Here’s a phase diagram from that discussion, which made me laugh quite a bit:
[image of pie crust phases]
Here’s a bit of the discussions below it, to whet your appetite… […] Click to continue reading this post
Remember the Orionids? Well, it is the turn of the Leonids. These comets are the result of us passing through the debris left by comet Tempel-Tuttle. The peak will be on the 19th November…. Viewing and other information here (Armagh Observatory), here (a NASA site), and here, from Gary W. Kronk’s site (as is the diagram below). Here’s a nice Space.com article by Joe Rao.
There is expected to be quite a spike in the viewing rate this year… enhanced by a factor of ten to maybe as many as 100 or 200 per hour. This is for the lucky viewers in Western Europe (and the British Isles 🙂 ), North Wester Africa, North Eastern USA and Eastern Canada, […] Click to continue reading this post
So the press conference is over. I did not listen to it, but the gist of it, from the press release, seems to be that they’ve observed several more supernovae to pin down even more accurately what the universe’s expansion rate was at very early times (up to nine or ten billion years ago). Image below from their site:
[image]
From the site we learn (for background): Click to continue reading this post
From NASA, tomorrow, at 1:00pm EST: An announcement about Dark Energy. If the pattern of last time is to be followed, there must be new evidence from the space telescope team (represented by Riess and Livio at the press conference) in favour of one interpretation or another. Since they are saying that they will “announce the discovery that dark energy has been an ever-present constituent of space for most of the universe’s historyâ€, I imagine that means that there is stronger evidence than before for Dark Energy being a cosmological constant. […] Click to continue reading this post
Those are the words of Kofi Annan at the UN conference on Climate Change earlier today (see AP story by Charles Hanley). His speech emphasized the “frightening lack of leadership” in forming strategies for how to tackle the huge task that lies ahead for our planet with regards emissions. Getting … Click to continue reading this post
USC has launched a Bachelor’s degree in video games. I know what you’re thinking. Stop it! No, civilisation is not doomed. (Image on right grabbed from Chip Chick). In fact, this could be rather wonderful, as it will create the opportunity to develop the potential of this medium in so many wonderful ways. It will not be about kids sitting there blowing up stuff and shooting up people. Why do I say this?
I remind you that in 1929 USC founded the first film school (at least in the USA)…. I imagine that people turned up their noses at this. Film is now recognized as a major art form, and a powerful tool for education and expression, with USC continuing to lead the pack in educating artists, visionaries and technicians in that area, feeding the local Industry and well beyond.
Doing a degree in film or movie-making (or “The Cinematic Arts”, as we are supposed […] Click to continue reading this post
Not many Mondays ago we had a colloquium entitled “Quantum Chaos and the Foundations of Statistical Mechanics”, by Mark Srednicki, of UCSB.
This was a double treat for me, since I’ve known Mark since my days in Santa Barbara, and remember many happy lunchtimes sitting at lunch with him overlooking the lagoon talking about everything from physics to Bablyon 5. That was during those truly amazing days of being a postdoc in string theory at the time when D-brane technology was turning the field upside down, and a lot of the torque needed for this was being generated right there in Santa Barbara, sometimes in lunchtime conversations. I was reminiscing about those days just a week before in Cambridge, having run into Karl Landsteiner and Roberto Emparan, two other postdocs from those fantastic times. The reason for us all being in Cambridge was to attend the Andrew Chamblin memorial conference, which I told you about in an earlier post. Andrew was also a postdoc there, around the same time as us, and we rapidly forged the good friendships that you’ve read about in a number of earlier posts linked from the previous link.
Mark used to tell me a bit about Quantum Chaos back then too, and I found it interesting, but always wanted to hear the story laid out properly, and to hear what he […] Click to continue reading this post
You may recall the very successful event called “Uncertainty”, back at the end of August. I blogged about it here and here, among other places. Well it is time for the second one in the series. Recall that it is part of the Provost’s Visions and Voices series, which has … Click to continue reading this post
Just to let you know… I’ll not be blogging at Cosmic Variance any more. The five of us started an excellent thing over there, and had some fun times (with the help of many of you – thanks). I imagine that will continue, so don’t forget to make sure to … Click to continue reading this post
Spent most of the daylight hours downtown today. Well worth it. Been a while since I’ve been to Grand Central Market.
The Eye of Sauron is rising again, but now on Saturn!?
No, here’s what’s actually going on:
